Section 65.92 - Inspection authorization: Duration(a) Each inspection authorization expires on March 31 of each odd-numbered year. However, the holder may exercise the privileges of that authorization only while he holds a currently effective mechanic certificate with both a currently effective airframe rating and a currently effective powerplant rating.(b) An inspection authorization ceases to be effective whenever any of the following occurs: (1) The authorization is surrendered, suspended, or revoked.(2) The holder no longer has a fixed base of operation.(3) The holder no longer has the equipment, facilities, and inspection data required by § 65.91(c) (3) and (4) for issuance of his authorization.(c) The holder of an inspection authorization that is suspended or revoked shall, upon the Administrator's request, return it to the Administrator.Doc. No. 12537, 42 FR 46279, Sept. 15, 1977, as amended by Amdt. 65-50, 72 FR 4404 , Jan. 30, 2007