14 CFR 117.5 - Fitness for duty.
(b) No certificate holder may assign and no flightcrew member may accept assignment to a flight duty period if the flightcrew member has reported for a flight duty period too fatigued to safely perform his or her assigned duties.
(c) No certificate holder may permit a flightcrew member to continue a flight duty period if the flightcrew member has reported him or herself too fatigued to continue the assigned flight duty period.
Title 14 published on 2015-11-17.
No entries appear in the Federal Register after this date, for 14 CFR Part 117.