Section 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:(2) Aeronautical knowledge.(5) Privileges and limits.(b) Other provisions of this part apply to the logging of flight time and testing.Doc. No. FAA-2001-11133, 69 FR 44875 , July 27, 2004, as amended by Amdt. 61-125, 75 FR 5222 , Feb. 1, 2010