The following is an extract from DAOD 5002-04 dated 29 Apr 04:
Period of Service The period of service for Supp Res members is 10 years or until CRA, whichever comes first.
DMHRR is the approving authority for any extension to the 10-year period of service. Requests for an extension by members who have not served on Class "A", "B" or "C" Reserve Service within the last ten years are normally not approved.