Canadian Aviation Regulations (SOR/96-433)

700.51 (1) An air operator shall not assign to a flight crew member more than three consecutive flight duty periods if any part of those periods falls between 02:00 and 05:59, unless the air operator provides the member with one local night’s rest at the end of the third flight duty period.

(2) However, an air operator may assign to a flight crew member up to five consecutive flight duty periods even if any part of those periods falls between 02:00 and 05:59 if the member is provided with

• (a) a rest period of three hours in suitable accommodation during each flight duty period; and

• (b) 56 consecutive hours free from duty at the end of the last consecutive flight duty period.