Which regulation outlines the requirements for issuing mechanic certificates?

The regulation that outlines the requirements for issuing mechanic certificates is 14 CFR 65. This part of the Code of Federal Regulations specifically deals with the certification of airmen and the criteria for obtaining and maintaining various types of certificates and ratings, including mechanic certificates. It sets forth the eligibility requirements, as well as the privileges and limitations associated with these certificates.

In contrast, 14 CFR 43 primarily addresses the maintenance and alterations of aircraft, detailing the standards for performing these tasks but not specifically focusing on certificate issuance. 14 CFR 91 refers to general operating and flight rules for aircraft and does not cover the certification processes. AC 43.13-3 is an advisory circular that provides guidance on acceptable methods for maintenance but does not have regulatory authority itself regarding certification. Thus, 14 CFR 65 is the correct choice as it directly pertains to the issuance of mechanic certificates and the qualifications required for obtaining them.