46 U.S.C. § 2112 - U.S. Code - Unannotated Title 46. Shipping § 2112. Authority to change working hours

(1) the total period for which overtime pay may be required under section 2111 of this title may not be more than 15 hours between any 2 periods of ordinary working hours on other than Sundays and holidays;

(2) the length of the working day for the officers and employees involved may not be changed; and

(3) the rate of overtime pay may not be changed.