14 CFR § 61.181
Applicability
July 13, 2020
This subpart prescribes the requirements for the issuance of flight instructor certificates and ratings (except for flight instructor certificates with a sport pilot rating), the conditions under which those certificates and ratings are necessary, and the limitations on those certificates and ratings.
[Doc. No. FAA-2001-11133, 69 FR 44869, July 27, 2004]