14 C.F.R. § 61.401
What is the purpose of this subpart?
(a) This part prescribes the following requirements that apply to a flight instructor certificate with a sport pilot rating:
(1) Eligibility.
(2) Aeronautical knowledge.
(3) Flight proficiency.
(4) Endorsements.
(5) Privileges and limits.
(b) Other provisions of this part apply to the logging of flight time and testing.