14 CFR §65.83
A certificated mechanic may not exercise the privileges of his certificate and rating unless, within the preceding 24 months—
- (a)The Administrator has found that he is able to do that work; or
- (b)He has, for at least 6 months—
- (1)Served as a mechanic under his certificate and rating;
- (2)Technically supervised other mechanics;
- (3)Supervised, in an executive capacity, the maintenance or alteration of aircraft; or
- (4)Been engaged in any combination of paragraph (b) (1), (2), or (3) of this section.