An approach for enhancing service continuity in the case of a communication failure between a repository and a controller of a spectrum sharing communication system as described. The repository is operable to at least one of store and generate restrictions governing use of a set of spectrum resources, and the controller is operable to receive the restriction from the repository and to enforce the restrictions A method implementation performed, for example, by the controller may comprise determining occurrence of a communication failure between the repository and the controller and, in response to the communication failure, taking one or more actions that result in an at least temporary continued use of spectrum resources under control of the controller.