Notice also that only "flight" times change for Overseas and International ops

§ 121.513 Flight time limitations: Overseas and international operations: airplanes.

In place of the flight time limitations in §§121.503 through 121.511, a certificate holder conducting supplemental operations may elect to comply with the flight time limitations of §§121.515 and 121.521 through 121.525 for operations conducted—
(a) Between a place in the 48 contiguous States and the District of Columbia, or Alaska, and any place outside thereof;
(b) Between any two places outside the 48 contiguous States, the District of Columbia, and Alaska; or
(c) Between two places within the State of Alaska or the State of Hawaii.
[Doc. No. 6258, 29 FR 19218, Dec. 31, 1964; 30 FR 3639, Mar. 19, 1965, as amended by Amdt. 121–253, 61 FR 2613, Jan. 26, 1996]

§ 121.515 Flight time limitations: All airmen: airplanes.
No airman may be aloft as a flight crewmember more than 1,000 hours in any 12-calendar-month period.


§ 121.521 Flight time limitations: Crew of two pilots and one additional airman as required.
(a) No certificate holder conducting supplemental operations may schedule an airman to be aloft as a member of the flight crew in an airplane that has a crew of two pilots and at least one additional flight crewmember for more than 12 hours during any 24 consecutive hours.
(b) If an airman has been aloft as a member of a flight crew for 20 or more hours during any 48 consecutive hours or 24 or more hours during any 72 consecutive hours, he must be given at least 18 hours of rest before being assigned to any duty with the certificate holder. In any case, he must be relieved of all duty for at least 24 consecutive hours during any seven consecutive days.
(c) No airman may be aloft as a flight crewmember more than—
(1) 120 hours during any 30 consecutive days; or
(2) 300 hours during any 90 consecutive days.
[Doc. No. 6258, 29 FR 19218, Dec. 31, 1964, as amended by Amdt. 121–17, 31 FR 1147, Jan. 28, 1966; Amdt. 121–253, 61 FR 2613, Jan. 26, 1996]

§ 121.523 Flight time limitations: Crew of three or more pilots and additional airmen as required.
(a) No certificate holder conducting supplemental operations may schedule an airman for flight deck duty as a flight engineer, or navigator in a crew of three or more pilots and additional airmen for a total of more than 12 hours during any 24 consecutive hours.
(b) Each certificate holder conducting supplemental operations shall schedule its flight hours to provide adequate rest periods on the ground for each airman who is away from his principal operations base. It shall also provide adequate sleeping quarters on the airplane whenever an airman is scheduled to be aloft as a flight crewmember for more than 12 hours during any 24 consecutive hours.
(c) No certificate holder conducting supplemental operations may schedule any flight crewmember to be on continuous duty for more than 30 hours. Such a crewmember is considered to be on continuous duty from the time he reports for duty until the time he is released from duty for a rest period of at least 10 hours on the ground. If a flight crewmember is on continuous duty for more than 24 hours (whether scheduled or not) duty any scheduled duty period, he must be given at least 16 hours for rest on the ground after completing the last flight scheduled for that scheduled duty period before being assigned any further flight duty.
(d) If a flight crewmember is required to engage in deadhead transportation for more than four hours before beginning flight duty, one half of the time spent in deadhead transportation must be treated as duty time for the purpose of complying with duty time limitations, unless he is given at least 10 hours of rest on the ground before being assigned to flight duty.
(e) Each certificate holder conducting supplemental operations shall give each airman, upon return to his operations base from any flight or series of flights, a rest period that is at least twice the total number of hours he was aloft as a flight crewmember since the last rest period at his base, before assigning him to any further duty. If the required rest period is more than seven days, that part of the rest period that is more than seven days may be given at any time before the pilot is again scheduled for flight duty.
(f) No airman may be aloft as a flight crewmember for more than 350 hours in any 90 consecutive days.
[Doc. No. 6258, 29 FR 19218, Dec. 31, 1964; 30 FR 3639, Mar. 19, 1965, as amended by Amdt. 121–253, 61 FR 2613, Jan. 26, 1996]