diff --git a/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/ietf_slice_handler.py b/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/ietf_slice_handler.py
index 6c52a43988d041048c2d3f5efa927e0f5a90284b..80ce4c6b78d446ff1e08a750f236e0c143e1ba57 100644
--- a/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/ietf_slice_handler.py
+++ b/src/nbi/service/rest_server/nbi_plugins/ietf_network_slice/ietf_slice_handler.py
@@ -1,3 +1,17 @@
+# Copyright 2022-2024 ETSI OSG/SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)
+#
+# 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.
+
 import json
 import logging
 import uuid