its use is subject to a coordination procedure (Article 9);
there is a desire to secure international recognition of its use.
If an assignment is not consistent with the Table of Frequency Allocations or other provisions of the Regulations, an administration may also request that it should be included in the Master Register solely for information purposes. When an administration considers that the above conditions are met, it submits appropriate notice forms indicating the relevant characteristics of the frequency assignment, as specified in Appendix 4 of the Radio Regulations.
When an assignment is no longer used, its cancellation is also to be notified.