14 CFR §65.50
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The holder of an air traffic control tower operator certificate may not perform any duties under that certificate unless—
- (a)He has served for at least three of the preceding 6 months as an air traffic control tower operator at the control tower to which his facility rating applies, or at the operating positions for which he has qualified; or
- (b)He has shown that he meets the requirements for his certificate and facility rating at the control tower concerned, or for operating at positions for which he has previously qualified.