14 C.F.R. § 147.39 Display of certificate.
Title 14 - Aeronautics and Space
Each holder of an aviation maintenance technician school certificate and ratings shall display them at a place in the school that is normally accessible to the public and is not obscured. The certificate must be available for inspection by the Administrator.
Title 14: Aeronautics and Space
PART 147—AVIATION MAINTENANCE TECHNICIAN SCHOOLS
Subpart C—Operating Rules
§ 147.39 Display of certificate.