diff --git a/metropolis/node/core/abloader/main.rs b/metropolis/node/core/abloader/main.rs
index 905c3ca..4489b73 100644
--- a/metropolis/node/core/abloader/main.rs
+++ b/metropolis/node/core/abloader/main.rs
@@ -1,3 +1,8 @@
+/*
+ * Copyright The Monogon Project Authors.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 #![no_main]
 #![no_std]
 
diff --git a/metropolis/node/core/abloader/spec/gomod-generated-placeholder.go b/metropolis/node/core/abloader/spec/gomod-generated-placeholder.go
index f09cd57..ca2145c 100644
--- a/metropolis/node/core/abloader/spec/gomod-generated-placeholder.go
+++ b/metropolis/node/core/abloader/spec/gomod-generated-placeholder.go
@@ -1 +1,4 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package spec
diff --git a/metropolis/node/core/bios_bootcode/genlogo/main.go b/metropolis/node/core/bios_bootcode/genlogo/main.go
index 23686fd..f810357 100644
--- a/metropolis/node/core/bios_bootcode/genlogo/main.go
+++ b/metropolis/node/core/bios_bootcode/genlogo/main.go
@@ -1,5 +1,5 @@
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-// Copyright Monogon Project Authors
 
 package main
 
diff --git a/metropolis/node/core/cluster/cluster.go b/metropolis/node/core/cluster/cluster.go
index e320bb0..a009c33 100644
--- a/metropolis/node/core/cluster/cluster.go
+++ b/metropolis/node/core/cluster/cluster.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // Package cluster implements low-level clustering logic, especially logic
 // regarding to bootstrapping, registering into and joining a cluster. Its goal
diff --git a/metropolis/node/core/cluster/cluster_bootstrap.go b/metropolis/node/core/cluster/cluster_bootstrap.go
index bb82df9..4a6c1c7 100644
--- a/metropolis/node/core/cluster/cluster_bootstrap.go
+++ b/metropolis/node/core/cluster/cluster_bootstrap.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package cluster
 
diff --git a/metropolis/node/core/cluster/cluster_join.go b/metropolis/node/core/cluster/cluster_join.go
index 112b463..eb0ff73 100644
--- a/metropolis/node/core/cluster/cluster_join.go
+++ b/metropolis/node/core/cluster/cluster_join.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package cluster
 
 import (
diff --git a/metropolis/node/core/cluster/cluster_register.go b/metropolis/node/core/cluster/cluster_register.go
index 5df7448..a6089cb 100644
--- a/metropolis/node/core/cluster/cluster_register.go
+++ b/metropolis/node/core/cluster/cluster_register.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package cluster
 
 import (
diff --git a/metropolis/node/core/clusternet/clusternet.go b/metropolis/node/core/clusternet/clusternet.go
index 96a500d..89c5c10 100644
--- a/metropolis/node/core/clusternet/clusternet.go
+++ b/metropolis/node/core/clusternet/clusternet.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package clusternet implements a Cluster Networking mesh service running on all
 // Metropolis nodes.
 //
diff --git a/metropolis/node/core/clusternet/clusternet_test.go b/metropolis/node/core/clusternet/clusternet_test.go
index f07f3e5..317c409 100644
--- a/metropolis/node/core/clusternet/clusternet_test.go
+++ b/metropolis/node/core/clusternet/clusternet_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package clusternet
 
 import (
diff --git a/metropolis/node/core/clusternet/types.go b/metropolis/node/core/clusternet/types.go
index 67e401a..d1f2b06 100644
--- a/metropolis/node/core/clusternet/types.go
+++ b/metropolis/node/core/clusternet/types.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package clusternet
 
 import (
diff --git a/metropolis/node/core/clusternet/wireguard.go b/metropolis/node/core/clusternet/wireguard.go
index cc5f941..096e74d 100644
--- a/metropolis/node/core/clusternet/wireguard.go
+++ b/metropolis/node/core/clusternet/wireguard.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package clusternet
 
 import (
diff --git a/metropolis/node/core/consensus/client/client.go b/metropolis/node/core/consensus/client/client.go
index 449274a..75489cc 100644
--- a/metropolis/node/core/consensus/client/client.go
+++ b/metropolis/node/core/consensus/client/client.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // package client implements a higher-level client for consensus/etcd that is
 // to be used within the Metropolis node code for unprivileged access (ie.
diff --git a/metropolis/node/core/consensus/client/unimplemented.go b/metropolis/node/core/consensus/client/unimplemented.go
index 9b146eb..c80bc47 100644
--- a/metropolis/node/core/consensus/client/unimplemented.go
+++ b/metropolis/node/core/consensus/client/unimplemented.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package client
 
 import (
diff --git a/metropolis/node/core/consensus/configuration.go b/metropolis/node/core/consensus/configuration.go
index 071f5f5..a3379ca 100644
--- a/metropolis/node/core/consensus/configuration.go
+++ b/metropolis/node/core/consensus/configuration.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package consensus
 
 import (
diff --git a/metropolis/node/core/consensus/consensus.go b/metropolis/node/core/consensus/consensus.go
index 12913bd..69ded4f 100644
--- a/metropolis/node/core/consensus/consensus.go
+++ b/metropolis/node/core/consensus/consensus.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // Package consensus implements a runnable that manages an etcd instance which
 // forms part of a Metropolis etcd cluster. This cluster is a foundational
diff --git a/metropolis/node/core/consensus/consensus_test.go b/metropolis/node/core/consensus/consensus_test.go
index 64dd0b3..d1aa2aa 100644
--- a/metropolis/node/core/consensus/consensus_test.go
+++ b/metropolis/node/core/consensus/consensus_test.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package consensus
 
diff --git a/metropolis/node/core/consensus/logparser.go b/metropolis/node/core/consensus/logparser.go
index f825431..bdf2982 100644
--- a/metropolis/node/core/consensus/logparser.go
+++ b/metropolis/node/core/consensus/logparser.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package consensus
 
 import (
diff --git a/metropolis/node/core/consensus/logparser_test.go b/metropolis/node/core/consensus/logparser_test.go
index 101211c..52a9f8e 100644
--- a/metropolis/node/core/consensus/logparser_test.go
+++ b/metropolis/node/core/consensus/logparser_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package consensus
 
 import (
diff --git a/metropolis/node/core/consensus/status.go b/metropolis/node/core/consensus/status.go
index 40988e5..0886531 100644
--- a/metropolis/node/core/consensus/status.go
+++ b/metropolis/node/core/consensus/status.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package consensus
 
 import (
diff --git a/metropolis/node/core/consensus/testhelpers.go b/metropolis/node/core/consensus/testhelpers.go
index 3471e3c..6411cc3 100644
--- a/metropolis/node/core/consensus/testhelpers.go
+++ b/metropolis/node/core/consensus/testhelpers.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package consensus
 
 import (
diff --git a/metropolis/node/core/curator/bootstrap.go b/metropolis/node/core/curator/bootstrap.go
index bdc7f28..fe5e4b0 100644
--- a/metropolis/node/core/curator/bootstrap.go
+++ b/metropolis/node/core/curator/bootstrap.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/curator.go b/metropolis/node/core/curator/curator.go
index 237a50c..5f6ffa1 100644
--- a/metropolis/node/core/curator/curator.go
+++ b/metropolis/node/core/curator/curator.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // package curator implements the Curator, a service responsible for management
 // of the Metropolis cluster that it is running on.
 //
diff --git a/metropolis/node/core/curator/curator_test.go b/metropolis/node/core/curator/curator_test.go
index 841a813..da021c0 100644
--- a/metropolis/node/core/curator/curator_test.go
+++ b/metropolis/node/core/curator/curator_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/filters.go b/metropolis/node/core/curator/filters.go
index 4a100bb..c569d3b 100644
--- a/metropolis/node/core/curator/filters.go
+++ b/metropolis/node/core/curator/filters.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // This file contains common implementation related to filtering of protobuf
 // messages with Common Expression Language.
 package curator
diff --git a/metropolis/node/core/curator/impl_follower.go b/metropolis/node/core/curator/impl_follower.go
index 1df859c..96a9385 100644
--- a/metropolis/node/core/curator/impl_follower.go
+++ b/metropolis/node/core/curator/impl_follower.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/impl_leader.go b/metropolis/node/core/curator/impl_leader.go
index f40c8d2..9107b92 100644
--- a/metropolis/node/core/curator/impl_leader.go
+++ b/metropolis/node/core/curator/impl_leader.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/impl_leader_aaa.go b/metropolis/node/core/curator/impl_leader_aaa.go
index 8f4eb84..8813108 100644
--- a/metropolis/node/core/curator/impl_leader_aaa.go
+++ b/metropolis/node/core/curator/impl_leader_aaa.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/impl_leader_background.go b/metropolis/node/core/curator/impl_leader_background.go
index 11c4134..df6e24d 100644
--- a/metropolis/node/core/curator/impl_leader_background.go
+++ b/metropolis/node/core/curator/impl_leader_background.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/impl_leader_certificates.go b/metropolis/node/core/curator/impl_leader_certificates.go
index 40211fd..1326c4c 100644
--- a/metropolis/node/core/curator/impl_leader_certificates.go
+++ b/metropolis/node/core/curator/impl_leader_certificates.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/impl_leader_cluster_networking.go b/metropolis/node/core/curator/impl_leader_cluster_networking.go
index b2cc8ba..6ab1bfb 100644
--- a/metropolis/node/core/curator/impl_leader_cluster_networking.go
+++ b/metropolis/node/core/curator/impl_leader_cluster_networking.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/impl_leader_curator.go b/metropolis/node/core/curator/impl_leader_curator.go
index 0246498..addd789 100644
--- a/metropolis/node/core/curator/impl_leader_curator.go
+++ b/metropolis/node/core/curator/impl_leader_curator.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/impl_leader_management.go b/metropolis/node/core/curator/impl_leader_management.go
index f6fe159..517144c 100644
--- a/metropolis/node/core/curator/impl_leader_management.go
+++ b/metropolis/node/core/curator/impl_leader_management.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/impl_leader_test.go b/metropolis/node/core/curator/impl_leader_test.go
index dc8bdee..59788e8 100644
--- a/metropolis/node/core/curator/impl_leader_test.go
+++ b/metropolis/node/core/curator/impl_leader_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/listener.go b/metropolis/node/core/curator/listener.go
index 40d1f19..cb79cd8 100644
--- a/metropolis/node/core/curator/listener.go
+++ b/metropolis/node/core/curator/listener.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/proto/api/gomod-generated-placeholder.go b/metropolis/node/core/curator/proto/api/gomod-generated-placeholder.go
index 778f64e..da08b30 100644
--- a/metropolis/node/core/curator/proto/api/gomod-generated-placeholder.go
+++ b/metropolis/node/core/curator/proto/api/gomod-generated-placeholder.go
@@ -1 +1,4 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package api
diff --git a/metropolis/node/core/curator/proto/private/gomod-generated-placeholder.go b/metropolis/node/core/curator/proto/private/gomod-generated-placeholder.go
index 735e4dc..b4ed19a 100644
--- a/metropolis/node/core/curator/proto/private/gomod-generated-placeholder.go
+++ b/metropolis/node/core/curator/proto/private/gomod-generated-placeholder.go
@@ -1 +1,4 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package private
diff --git a/metropolis/node/core/curator/reconfigure.go b/metropolis/node/core/curator/reconfigure.go
index 8349a68..ea31174 100644
--- a/metropolis/node/core/curator/reconfigure.go
+++ b/metropolis/node/core/curator/reconfigure.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/reconfigure_test.go b/metropolis/node/core/curator/reconfigure_test.go
index fb363da..2f63485 100644
--- a/metropolis/node/core/curator/reconfigure_test.go
+++ b/metropolis/node/core/curator/reconfigure_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/state.go b/metropolis/node/core/curator/state.go
index 39837a7..ce4ff3d 100644
--- a/metropolis/node/core/curator/state.go
+++ b/metropolis/node/core/curator/state.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/state_cluster.go b/metropolis/node/core/curator/state_cluster.go
index 6c3f39c..e678414 100644
--- a/metropolis/node/core/curator/state_cluster.go
+++ b/metropolis/node/core/curator/state_cluster.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/state_node.go b/metropolis/node/core/curator/state_node.go
index 5138134..7ada43a 100644
--- a/metropolis/node/core/curator/state_node.go
+++ b/metropolis/node/core/curator/state_node.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package curator
 
diff --git a/metropolis/node/core/curator/state_pki.go b/metropolis/node/core/curator/state_pki.go
index 7eb3f76..4b0cf76 100644
--- a/metropolis/node/core/curator/state_pki.go
+++ b/metropolis/node/core/curator/state_pki.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/state_registerticket.go b/metropolis/node/core/curator/state_registerticket.go
index 8b8ea15..41b6fb8 100644
--- a/metropolis/node/core/curator/state_registerticket.go
+++ b/metropolis/node/core/curator/state_registerticket.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import (
diff --git a/metropolis/node/core/curator/state_test.go b/metropolis/node/core/curator/state_test.go
index 0bee7e1..faafab0 100644
--- a/metropolis/node/core/curator/state_test.go
+++ b/metropolis/node/core/curator/state_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package curator
 
 import "testing"
diff --git a/metropolis/node/core/curator/watcher/watch_node.go b/metropolis/node/core/curator/watcher/watch_node.go
index 45c51ab..cc2d498 100644
--- a/metropolis/node/core/curator/watcher/watch_node.go
+++ b/metropolis/node/core/curator/watcher/watch_node.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package watcher
 
 import (
diff --git a/metropolis/node/core/curator/watcher/watch_nodes.go b/metropolis/node/core/curator/watcher/watch_nodes.go
index 4c08d34..fbd1be7 100644
--- a/metropolis/node/core/curator/watcher/watch_nodes.go
+++ b/metropolis/node/core/curator/watcher/watch_nodes.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package watcher
 
 import (
diff --git a/metropolis/node/core/debug_service_disabled.go b/metropolis/node/core/debug_service_disabled.go
index 815a0dd..4ba72cb 100644
--- a/metropolis/node/core/debug_service_disabled.go
+++ b/metropolis/node/core/debug_service_disabled.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (
diff --git a/metropolis/node/core/debug_service_enabled.go b/metropolis/node/core/debug_service_enabled.go
index b455757..4f8495f 100644
--- a/metropolis/node/core/debug_service_enabled.go
+++ b/metropolis/node/core/debug_service_enabled.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/metropolis/node/core/delve_disabled.go b/metropolis/node/core/delve_disabled.go
index 116ae3e..93ea312 100644
--- a/metropolis/node/core/delve_disabled.go
+++ b/metropolis/node/core/delve_disabled.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/metropolis/node/core/delve_enabled.go b/metropolis/node/core/delve_enabled.go
index 0bd546f..54a64c7 100644
--- a/metropolis/node/core/delve_enabled.go
+++ b/metropolis/node/core/delve_enabled.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/metropolis/node/core/devmgr/devmgr.go b/metropolis/node/core/devmgr/devmgr.go
index b5c1835..41730fc 100644
--- a/metropolis/node/core/devmgr/devmgr.go
+++ b/metropolis/node/core/devmgr/devmgr.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package devmgr is the userspace pendant to the kernel device management
 // system. It talks to the kernel and the performs any further userspace actions
 // related to device events. It corresponds very roughly to systemd-udevd on
diff --git a/metropolis/node/core/identity/certificates.go b/metropolis/node/core/identity/certificates.go
index 86cfd13..8e774c6 100644
--- a/metropolis/node/core/identity/certificates.go
+++ b/metropolis/node/core/identity/certificates.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package identity
 
 import (
diff --git a/metropolis/node/core/identity/certificates_test.go b/metropolis/node/core/identity/certificates_test.go
index d2dd0cd..903bbe8 100644
--- a/metropolis/node/core/identity/certificates_test.go
+++ b/metropolis/node/core/identity/certificates_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package identity
 
 import (
diff --git a/metropolis/node/core/identity/identity.go b/metropolis/node/core/identity/identity.go
index 6663771..399a2d4 100644
--- a/metropolis/node/core/identity/identity.go
+++ b/metropolis/node/core/identity/identity.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package identity
 
 import (
diff --git a/metropolis/node/core/localstorage/crypt/blockdev.go b/metropolis/node/core/localstorage/crypt/blockdev.go
index d3c915e..d2c1b15 100644
--- a/metropolis/node/core/localstorage/crypt/blockdev.go
+++ b/metropolis/node/core/localstorage/crypt/blockdev.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package crypt
 
diff --git a/metropolis/node/core/localstorage/crypt/crypt.go b/metropolis/node/core/localstorage/crypt/crypt.go
index bd20efd..b429fdf 100644
--- a/metropolis/node/core/localstorage/crypt/crypt.go
+++ b/metropolis/node/core/localstorage/crypt/crypt.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // Package crypt implements block device (eg. disk) encryption and authentication
 // using dm-crypt and dm-integrity.
diff --git a/metropolis/node/core/localstorage/crypt/crypt_encryption.go b/metropolis/node/core/localstorage/crypt/crypt_encryption.go
index fb8a129..3c11a6d 100644
--- a/metropolis/node/core/localstorage/crypt/crypt_encryption.go
+++ b/metropolis/node/core/localstorage/crypt/crypt_encryption.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package crypt
 
 import (
diff --git a/metropolis/node/core/localstorage/crypt/crypt_integrity.go b/metropolis/node/core/localstorage/crypt/crypt_integrity.go
index b2e43f8..99b77a5 100644
--- a/metropolis/node/core/localstorage/crypt/crypt_integrity.go
+++ b/metropolis/node/core/localstorage/crypt/crypt_integrity.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package crypt
 
 import (
diff --git a/metropolis/node/core/localstorage/crypt/crypt_test.go b/metropolis/node/core/localstorage/crypt/crypt_test.go
index 7d8db9d..e99bdf5 100644
--- a/metropolis/node/core/localstorage/crypt/crypt_test.go
+++ b/metropolis/node/core/localstorage/crypt/crypt_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package crypt
 
 import (
diff --git a/metropolis/node/core/localstorage/declarative/declarative.go b/metropolis/node/core/localstorage/declarative/declarative.go
index 5e194b5..6736e1f 100644
--- a/metropolis/node/core/localstorage/declarative/declarative.go
+++ b/metropolis/node/core/localstorage/declarative/declarative.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package declarative
 
diff --git a/metropolis/node/core/localstorage/declarative/placement.go b/metropolis/node/core/localstorage/declarative/placement.go
index a59912c..0406774 100644
--- a/metropolis/node/core/localstorage/declarative/placement.go
+++ b/metropolis/node/core/localstorage/declarative/placement.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package declarative
 
diff --git a/metropolis/node/core/localstorage/declarative/placement_local.go b/metropolis/node/core/localstorage/declarative/placement_local.go
index 77d407c..3e17241 100644
--- a/metropolis/node/core/localstorage/declarative/placement_local.go
+++ b/metropolis/node/core/localstorage/declarative/placement_local.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package declarative
 
diff --git a/metropolis/node/core/localstorage/directory_data.go b/metropolis/node/core/localstorage/directory_data.go
index ab1bcd9..ed3113f 100644
--- a/metropolis/node/core/localstorage/directory_data.go
+++ b/metropolis/node/core/localstorage/directory_data.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package localstorage
 
diff --git a/metropolis/node/core/localstorage/directory_pki.go b/metropolis/node/core/localstorage/directory_pki.go
index 75c8a2b..fcfec1c 100644
--- a/metropolis/node/core/localstorage/directory_pki.go
+++ b/metropolis/node/core/localstorage/directory_pki.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package localstorage
 
diff --git a/metropolis/node/core/localstorage/directory_root.go b/metropolis/node/core/localstorage/directory_root.go
index bfacb4e..d6d9995 100644
--- a/metropolis/node/core/localstorage/directory_root.go
+++ b/metropolis/node/core/localstorage/directory_root.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package localstorage
 
diff --git a/metropolis/node/core/localstorage/storage.go b/metropolis/node/core/localstorage/storage.go
index b6efcf3..029ce0c 100644
--- a/metropolis/node/core/localstorage/storage.go
+++ b/metropolis/node/core/localstorage/storage.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package localstorage
 
diff --git a/metropolis/node/core/localstorage/storage_esp.go b/metropolis/node/core/localstorage/storage_esp.go
index f2cf41f..4fd4e24 100644
--- a/metropolis/node/core/localstorage/storage_esp.go
+++ b/metropolis/node/core/localstorage/storage_esp.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package localstorage
 
diff --git a/metropolis/node/core/localstorage/storage_test.go b/metropolis/node/core/localstorage/storage_test.go
index b90d7a7..d360055 100644
--- a/metropolis/node/core/localstorage/storage_test.go
+++ b/metropolis/node/core/localstorage/storage_test.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package localstorage
 
diff --git a/metropolis/node/core/main.go b/metropolis/node/core/main.go
index 527030a..890a30b 100644
--- a/metropolis/node/core/main.go
+++ b/metropolis/node/core/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/metropolis/node/core/metrics/discovery.go b/metropolis/node/core/metrics/discovery.go
index 116291e..fea4582 100644
--- a/metropolis/node/core/metrics/discovery.go
+++ b/metropolis/node/core/metrics/discovery.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package metrics
 
 import (
diff --git a/metropolis/node/core/metrics/exporters.go b/metropolis/node/core/metrics/exporters.go
index 2e8c1df..003a690 100644
--- a/metropolis/node/core/metrics/exporters.go
+++ b/metropolis/node/core/metrics/exporters.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package metrics
 
 import (
diff --git a/metropolis/node/core/metrics/fake_exporter/fake_exporter.go b/metropolis/node/core/metrics/fake_exporter/fake_exporter.go
index 919851e..c289c60 100644
--- a/metropolis/node/core/metrics/fake_exporter/fake_exporter.go
+++ b/metropolis/node/core/metrics/fake_exporter/fake_exporter.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // fake_exporter is a tiny Prometheus-compatible metrics exporter which exports a
 // single metric with a value configured at startup. It is used to test the
 // metrics service.
diff --git a/metropolis/node/core/metrics/metrics.go b/metropolis/node/core/metrics/metrics.go
index b07a980..9abed54 100644
--- a/metropolis/node/core/metrics/metrics.go
+++ b/metropolis/node/core/metrics/metrics.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package metrics
 
 import (
diff --git a/metropolis/node/core/metrics/metrics_test.go b/metropolis/node/core/metrics/metrics_test.go
index fb5e3dc..b7c3eab 100644
--- a/metropolis/node/core/metrics/metrics_test.go
+++ b/metropolis/node/core/metrics/metrics_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package metrics
 
 import (
diff --git a/metropolis/node/core/mgmt/mgmt.go b/metropolis/node/core/mgmt/mgmt.go
index b0632bb..78961f2 100644
--- a/metropolis/node/core/mgmt/mgmt.go
+++ b/metropolis/node/core/mgmt/mgmt.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package mgmt implements the node-local management service, a.k.a.
 // metropolis.proto.api.NodeManagement.
 package mgmt
diff --git a/metropolis/node/core/mgmt/power.go b/metropolis/node/core/mgmt/power.go
index 9273ab3..6a3a8f2 100644
--- a/metropolis/node/core/mgmt/power.go
+++ b/metropolis/node/core/mgmt/power.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package mgmt
 
 import (
diff --git a/metropolis/node/core/mgmt/svc_logs.go b/metropolis/node/core/mgmt/svc_logs.go
index 6e27bf8..7a6ded5 100644
--- a/metropolis/node/core/mgmt/svc_logs.go
+++ b/metropolis/node/core/mgmt/svc_logs.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package mgmt
 
 import (
diff --git a/metropolis/node/core/mgmt/svc_logs_test.go b/metropolis/node/core/mgmt/svc_logs_test.go
index e91d2a3..f778084 100644
--- a/metropolis/node/core/mgmt/svc_logs_test.go
+++ b/metropolis/node/core/mgmt/svc_logs_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package mgmt
 
 import (
diff --git a/metropolis/node/core/mgmt/update.go b/metropolis/node/core/mgmt/update.go
index 6a7e13e..de9b876 100644
--- a/metropolis/node/core/mgmt/update.go
+++ b/metropolis/node/core/mgmt/update.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package mgmt
 
 import (
diff --git a/metropolis/node/core/mounts.go b/metropolis/node/core/mounts.go
index 02173c5..8b23b72 100644
--- a/metropolis/node/core/mounts.go
+++ b/metropolis/node/core/mounts.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/metropolis/node/core/network/dhcp4c/callback/callback.go b/metropolis/node/core/network/dhcp4c/callback/callback.go
index 2acc539..39c8ef1 100644
--- a/metropolis/node/core/network/dhcp4c/callback/callback.go
+++ b/metropolis/node/core/network/dhcp4c/callback/callback.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // Package callback contains minimal callbacks for configuring the kernel with
 // options received over DHCP.
diff --git a/metropolis/node/core/network/dhcp4c/callback/callback_test.go b/metropolis/node/core/network/dhcp4c/callback/callback_test.go
index 3045f47..d9735df 100644
--- a/metropolis/node/core/network/dhcp4c/callback/callback_test.go
+++ b/metropolis/node/core/network/dhcp4c/callback/callback_test.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package callback
 
diff --git a/metropolis/node/core/network/dhcp4c/dhcpc.go b/metropolis/node/core/network/dhcp4c/dhcpc.go
index 2b21cd0..dff272b 100644
--- a/metropolis/node/core/network/dhcp4c/dhcpc.go
+++ b/metropolis/node/core/network/dhcp4c/dhcpc.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // Package dhcp4c implements a DHCPv4 Client as specified in RFC2131 (with some
 // notable deviations).  It implements only the DHCP state machine itself, any
diff --git a/metropolis/node/core/network/dhcp4c/dhcpc_test.go b/metropolis/node/core/network/dhcp4c/dhcpc_test.go
index d9d5dd2..45be1a4 100644
--- a/metropolis/node/core/network/dhcp4c/dhcpc_test.go
+++ b/metropolis/node/core/network/dhcp4c/dhcpc_test.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package dhcp4c
 
diff --git a/metropolis/node/core/network/dhcp4c/doc.go b/metropolis/node/core/network/dhcp4c/doc.go
index 292bb28..622452b 100644
--- a/metropolis/node/core/network/dhcp4c/doc.go
+++ b/metropolis/node/core/network/dhcp4c/doc.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // Package dhcp4c provides a client implementation of the DHCPv4 protocol
 // (RFC2131) and a few extensions for Linux-based systems.
diff --git a/metropolis/node/core/network/dhcp4c/lease.go b/metropolis/node/core/network/dhcp4c/lease.go
index 5f1db6f..fefe092 100644
--- a/metropolis/node/core/network/dhcp4c/lease.go
+++ b/metropolis/node/core/network/dhcp4c/lease.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package dhcp4c
 
diff --git a/metropolis/node/core/network/dhcp4c/lease_test.go b/metropolis/node/core/network/dhcp4c/lease_test.go
index 070d1b6..5d233df 100644
--- a/metropolis/node/core/network/dhcp4c/lease_test.go
+++ b/metropolis/node/core/network/dhcp4c/lease_test.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package dhcp4c
 
diff --git a/metropolis/node/core/network/dhcp4c/transport/transport.go b/metropolis/node/core/network/dhcp4c/transport/transport.go
index deed14d..9a5ff14 100644
--- a/metropolis/node/core/network/dhcp4c/transport/transport.go
+++ b/metropolis/node/core/network/dhcp4c/transport/transport.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // Package transport contains Linux-based transports for the DHCP broadcast and
 // unicast specifications.
diff --git a/metropolis/node/core/network/dhcp4c/transport/transport_broadcast.go b/metropolis/node/core/network/dhcp4c/transport/transport_broadcast.go
index 7064255..b61af80 100644
--- a/metropolis/node/core/network/dhcp4c/transport/transport_broadcast.go
+++ b/metropolis/node/core/network/dhcp4c/transport/transport_broadcast.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package transport
 
diff --git a/metropolis/node/core/network/dhcp4c/transport/transport_unicast.go b/metropolis/node/core/network/dhcp4c/transport/transport_unicast.go
index 0876a82..b76e37c 100644
--- a/metropolis/node/core/network/dhcp4c/transport/transport_unicast.go
+++ b/metropolis/node/core/network/dhcp4c/transport/transport_unicast.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package transport
 
diff --git a/metropolis/node/core/network/hostsfile/hostsfile.go b/metropolis/node/core/network/hostsfile/hostsfile.go
index 2023eb3..e509935 100644
--- a/metropolis/node/core/network/hostsfile/hostsfile.go
+++ b/metropolis/node/core/network/hostsfile/hostsfile.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package hostsfile implements a service which owns and writes all node-local
 // files/interfaces used by the system to resolve the local node's name and the
 // names of other nodes in the cluster:
diff --git a/metropolis/node/core/network/main.go b/metropolis/node/core/network/main.go
index dd0023d..8b834ac 100644
--- a/metropolis/node/core/network/main.go
+++ b/metropolis/node/core/network/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package network
 
diff --git a/metropolis/node/core/network/neigh.go b/metropolis/node/core/network/neigh.go
index 33cf564..6058d0e 100644
--- a/metropolis/node/core/network/neigh.go
+++ b/metropolis/node/core/network/neigh.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package network
 
 import (
diff --git a/metropolis/node/core/network/quirks.go b/metropolis/node/core/network/quirks.go
index 547d91e..be30da4 100644
--- a/metropolis/node/core/network/quirks.go
+++ b/metropolis/node/core/network/quirks.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package network
 
 import (
diff --git a/metropolis/node/core/network/static.go b/metropolis/node/core/network/static.go
index 260b5a6..27c952a 100644
--- a/metropolis/node/core/network/static.go
+++ b/metropolis/node/core/network/static.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package network
 
 import (
diff --git a/metropolis/node/core/nodeparams.go b/metropolis/node/core/nodeparams.go
index 5aa6db8..edeb780 100644
--- a/metropolis/node/core/nodeparams.go
+++ b/metropolis/node/core/nodeparams.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (
diff --git a/metropolis/node/core/roleserve/roleserve.go b/metropolis/node/core/roleserve/roleserve.go
index e5e0d74..1f9604c 100644
--- a/metropolis/node/core/roleserve/roleserve.go
+++ b/metropolis/node/core/roleserve/roleserve.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package roleserve implements the roleserver/“Role Server”.
 //
 // The Role Server runs on every node and is responsible for running all of the
diff --git a/metropolis/node/core/roleserve/values.go b/metropolis/node/core/roleserve/values.go
index aa0c227..fda776c 100644
--- a/metropolis/node/core/roleserve/values.go
+++ b/metropolis/node/core/roleserve/values.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_clusternet.go b/metropolis/node/core/roleserve/worker_clusternet.go
index 6665b4a..3442030 100644
--- a/metropolis/node/core/roleserve/worker_clusternet.go
+++ b/metropolis/node/core/roleserve/worker_clusternet.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_controlplane.go b/metropolis/node/core/roleserve/worker_controlplane.go
index 9a2af52..74eb672 100644
--- a/metropolis/node/core/roleserve/worker_controlplane.go
+++ b/metropolis/node/core/roleserve/worker_controlplane.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_heartbeat.go b/metropolis/node/core/roleserve/worker_heartbeat.go
index ba5cecc..c31d203 100644
--- a/metropolis/node/core/roleserve/worker_heartbeat.go
+++ b/metropolis/node/core/roleserve/worker_heartbeat.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_hostsfile.go b/metropolis/node/core/roleserve/worker_hostsfile.go
index 54e2f49..7ba6e50 100644
--- a/metropolis/node/core/roleserve/worker_hostsfile.go
+++ b/metropolis/node/core/roleserve/worker_hostsfile.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_kubernetes.go b/metropolis/node/core/roleserve/worker_kubernetes.go
index cfab7cb..2bbbba8 100644
--- a/metropolis/node/core/roleserve/worker_kubernetes.go
+++ b/metropolis/node/core/roleserve/worker_kubernetes.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_metrics.go b/metropolis/node/core/roleserve/worker_metrics.go
index 8db7b4f..34f74ea 100644
--- a/metropolis/node/core/roleserve/worker_metrics.go
+++ b/metropolis/node/core/roleserve/worker_metrics.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_nodemgmt.go b/metropolis/node/core/roleserve/worker_nodemgmt.go
index 11f8faa..b6c6068 100644
--- a/metropolis/node/core/roleserve/worker_nodemgmt.go
+++ b/metropolis/node/core/roleserve/worker_nodemgmt.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_rolefetch.go b/metropolis/node/core/roleserve/worker_rolefetch.go
index 304451b..3900e12 100644
--- a/metropolis/node/core/roleserve/worker_rolefetch.go
+++ b/metropolis/node/core/roleserve/worker_rolefetch.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_statuspush.go b/metropolis/node/core/roleserve/worker_statuspush.go
index 2fd7b33..0557b4c 100644
--- a/metropolis/node/core/roleserve/worker_statuspush.go
+++ b/metropolis/node/core/roleserve/worker_statuspush.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/roleserve/worker_statuspush_test.go b/metropolis/node/core/roleserve/worker_statuspush_test.go
index 2e6024f..54683e7 100644
--- a/metropolis/node/core/roleserve/worker_statuspush_test.go
+++ b/metropolis/node/core/roleserve/worker_statuspush_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package roleserve
 
 import (
diff --git a/metropolis/node/core/rpc/client.go b/metropolis/node/core/rpc/client.go
index 72122b7..f364c5a 100644
--- a/metropolis/node/core/rpc/client.go
+++ b/metropolis/node/core/rpc/client.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package rpc
 
 import (
diff --git a/metropolis/node/core/rpc/methodinfo.go b/metropolis/node/core/rpc/methodinfo.go
index 0a597fa..e294feb 100644
--- a/metropolis/node/core/rpc/methodinfo.go
+++ b/metropolis/node/core/rpc/methodinfo.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package rpc
 
 import (
diff --git a/metropolis/node/core/rpc/peerinfo.go b/metropolis/node/core/rpc/peerinfo.go
index 55f949c..775623c 100644
--- a/metropolis/node/core/rpc/peerinfo.go
+++ b/metropolis/node/core/rpc/peerinfo.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package rpc
 
 import (
diff --git a/metropolis/node/core/rpc/resolver/processor.go b/metropolis/node/core/rpc/resolver/processor.go
index ad29021..fc581a2 100644
--- a/metropolis/node/core/rpc/resolver/processor.go
+++ b/metropolis/node/core/rpc/resolver/processor.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package resolver
 
 import (
diff --git a/metropolis/node/core/rpc/resolver/resolver.go b/metropolis/node/core/rpc/resolver/resolver.go
index c06911b..51b9cdf 100644
--- a/metropolis/node/core/rpc/resolver/resolver.go
+++ b/metropolis/node/core/rpc/resolver/resolver.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package resolver
 
 import (
diff --git a/metropolis/node/core/rpc/resolver/resolver_test.go b/metropolis/node/core/rpc/resolver/resolver_test.go
index 075fd09..72da280 100644
--- a/metropolis/node/core/rpc/resolver/resolver_test.go
+++ b/metropolis/node/core/rpc/resolver/resolver_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package resolver
 
 import (
diff --git a/metropolis/node/core/rpc/resolver/watcher.go b/metropolis/node/core/rpc/resolver/watcher.go
index c9fe47e..cb8f318 100644
--- a/metropolis/node/core/rpc/resolver/watcher.go
+++ b/metropolis/node/core/rpc/resolver/watcher.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package resolver
 
 import (
diff --git a/metropolis/node/core/rpc/server.go b/metropolis/node/core/rpc/server.go
index 3522822..ed8471a 100644
--- a/metropolis/node/core/rpc/server.go
+++ b/metropolis/node/core/rpc/server.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package rpc
 
 import (
diff --git a/metropolis/node/core/rpc/server_authentication.go b/metropolis/node/core/rpc/server_authentication.go
index 37c8fad..03d5a96 100644
--- a/metropolis/node/core/rpc/server_authentication.go
+++ b/metropolis/node/core/rpc/server_authentication.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package rpc
 
 import (
diff --git a/metropolis/node/core/rpc/server_authentication_test.go b/metropolis/node/core/rpc/server_authentication_test.go
index 8a869bd..a30ee86 100644
--- a/metropolis/node/core/rpc/server_authentication_test.go
+++ b/metropolis/node/core/rpc/server_authentication_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package rpc
 
 import (
diff --git a/metropolis/node/core/rpc/trace.go b/metropolis/node/core/rpc/trace.go
index f27a311..9f3c22d 100644
--- a/metropolis/node/core/rpc/trace.go
+++ b/metropolis/node/core/rpc/trace.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package rpc
 
 import (
diff --git a/metropolis/node/core/rpc/trace_test.go b/metropolis/node/core/rpc/trace_test.go
index 9bed935..50ba35e 100644
--- a/metropolis/node/core/rpc/trace_test.go
+++ b/metropolis/node/core/rpc/trace_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package rpc
 
 import (
diff --git a/metropolis/node/core/sysctl.go b/metropolis/node/core/sysctl.go
index 01b576c..2ff874e 100644
--- a/metropolis/node/core/sysctl.go
+++ b/metropolis/node/core/sysctl.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (
diff --git a/metropolis/node/core/tconsole/colors.go b/metropolis/node/core/tconsole/colors.go
index d1d5793..b488d92 100644
--- a/metropolis/node/core/tconsole/colors.go
+++ b/metropolis/node/core/tconsole/colors.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package tconsole
 
 import (
diff --git a/metropolis/node/core/tconsole/draw.go b/metropolis/node/core/tconsole/draw.go
index 4fec256..2c0979e 100644
--- a/metropolis/node/core/tconsole/draw.go
+++ b/metropolis/node/core/tconsole/draw.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package tconsole
 
 import (
diff --git a/metropolis/node/core/tconsole/page_logs.go b/metropolis/node/core/tconsole/page_logs.go
index d408d4d..525b4ce 100644
--- a/metropolis/node/core/tconsole/page_logs.go
+++ b/metropolis/node/core/tconsole/page_logs.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package tconsole
 
 import "github.com/gdamore/tcell/v2"
diff --git a/metropolis/node/core/tconsole/page_status.go b/metropolis/node/core/tconsole/page_status.go
index fbf4649..2843ddf 100644
--- a/metropolis/node/core/tconsole/page_status.go
+++ b/metropolis/node/core/tconsole/page_status.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package tconsole
 
 import (
diff --git a/metropolis/node/core/tconsole/standalone/main.go b/metropolis/node/core/tconsole/standalone/main.go
index d01ab4f..d9ceb18 100644
--- a/metropolis/node/core/tconsole/standalone/main.go
+++ b/metropolis/node/core/tconsole/standalone/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 // This is a standalone tconsole test application which works independently from
diff --git a/metropolis/node/core/tconsole/statusbar.go b/metropolis/node/core/tconsole/statusbar.go
index 06841c2..09ef10d 100644
--- a/metropolis/node/core/tconsole/statusbar.go
+++ b/metropolis/node/core/tconsole/statusbar.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package tconsole
 
 import (
diff --git a/metropolis/node/core/tconsole/tconsole.go b/metropolis/node/core/tconsole/tconsole.go
index b83a261..aa3df7b 100644
--- a/metropolis/node/core/tconsole/tconsole.go
+++ b/metropolis/node/core/tconsole/tconsole.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package tconsole
 
 import (
diff --git a/metropolis/node/core/time/time.go b/metropolis/node/core/time/time.go
index bd66e65..23400ef 100644
--- a/metropolis/node/core/time/time.go
+++ b/metropolis/node/core/time/time.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package time implements a supervisor runnable which is responsible for
 // keeping both the system clock and the RTC accurate.
 // Metropolis nodes need accurate time both for themselves (for log
diff --git a/metropolis/node/core/update/e2e/e2e_test.go b/metropolis/node/core/update/e2e/e2e_test.go
index 7679a69..f7d0e36 100644
--- a/metropolis/node/core/update/e2e/e2e_test.go
+++ b/metropolis/node/core/update/e2e/e2e_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package e2e
 
 import (
diff --git a/metropolis/node/core/update/e2e/testos/main.go b/metropolis/node/core/update/e2e/testos/main.go
index 4e7125b..39c019d 100644
--- a/metropolis/node/core/update/e2e/testos/main.go
+++ b/metropolis/node/core/update/e2e/testos/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (
diff --git a/metropolis/node/core/update/update.go b/metropolis/node/core/update/update.go
index ef302d1..0dbc485 100644
--- a/metropolis/node/core/update/update.go
+++ b/metropolis/node/core/update/update.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package update
 
 import (