diff --git a/osbase/event/etcd/etcd.go b/osbase/event/etcd/etcd.go
index 8cf2440..3d554f1 100644
--- a/osbase/event/etcd/etcd.go
+++ b/osbase/event/etcd/etcd.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package etcd
 
 import (
diff --git a/osbase/event/etcd/etcd_test.go b/osbase/event/etcd/etcd_test.go
index 5effa6e..a5cde20 100644
--- a/osbase/event/etcd/etcd_test.go
+++ b/osbase/event/etcd/etcd_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package etcd
 
 import (
diff --git a/osbase/event/event.go b/osbase/event/event.go
index e2e0bd8..8d2c077 100644
--- a/osbase/event/event.go
+++ b/osbase/event/event.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 event defines and implements Event Values, a mechanism in which
 // multiple consumers can watch a value for updates in a reliable way.
diff --git a/osbase/event/memory/example_test.go b/osbase/event/memory/example_test.go
index 1ae12c6..d452b34 100644
--- a/osbase/event/memory/example_test.go
+++ b/osbase/event/memory/example_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 memory
 
diff --git a/osbase/event/memory/memory.go b/osbase/event/memory/memory.go
index 09b120f..4960771 100644
--- a/osbase/event/memory/memory.go
+++ b/osbase/event/memory/memory.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 memory
 
diff --git a/osbase/event/memory/memory_test.go b/osbase/event/memory/memory_test.go
index b7d168b..c98eb42 100644
--- a/osbase/event/memory/memory_test.go
+++ b/osbase/event/memory/memory_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 memory