Title 14
SECTION 65.50
65.50 Currency requirements.
§ 65.50 Currency requirements.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.