14 CFR 117.13 - Flight duty period: Unaugmented operations.
(a) Except as provided for in § 117.15, no certificate holder may assign and no flightcrew member may accept an assignment for an unaugmented flight operation if the scheduled flight duty period will exceed the limits in Table B of this part.
(b) If the flightcrew member is not acclimated:
(1) The maximum flight duty period in Table B of this part is reduced by 30 minutes.
(2) The applicable flight duty period is based on the local time at the theater in which the flightcrew member was last acclimated.