CFR > Title 14 - Aeronautics and Space > CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER D—AIRMEN (parts 60 to 67) > PART 65—CERTIFICATION: AIRMEN OTHER THAN FLIGHT CREWMEMBERS > SUBPART B—Air Traffic Control Tower Operators (§65.31 to §65.50) > 65.47—Maximum hours.

65.47—Maximum hours.

Except in an emergency, a certificated air traffic control tower operator must be relieved of all duties for at least 24 consecutive hours at least once during each 7 consecutive days. Such an operator may not serve or be required to serve—
(a) For more than 10 consecutive hours; or
(b) For more than 10 hours during a period of 24 consecutive hours, unless he has had a rest period of at least 8 hours at or before the end of the 10 hours of duty.