The holder of a ground instructor certificate may not perform the duties of a ground instructor unless, within the preceding 12 months:
(a) The person has served for at least 3 months as a ground instructor; or
(b) The person has received an endorsement from an authorized ground or flight instructor certifying that the person has demonstrated safisfactory proficiency in the subject areas prescribed in §
61.213 (a)(3) and (a)(4), as applicable.
[Doc. No. 25910, 62 FR 16298, Apr. 4, 1997; Amdt. 61-103, 62 FR 40907, July 30, 1997]