Maybe Canada is on to something......
720.21 Flight Crew Members on Reserve
The standards for compliance with this section are:
(1) An air operator shall provide each flight crew member with an opportunity to obtain at least 8 consecutive hours sleep in any 24 consecutive hours while on reserve by one of the following methods:
(a) the air operator shall provide the flight crew member with 24 hours notice of the time of commencement and duration of the rest period. The designated rest period cannot shift more than 3 hours earlier or later than the preceding rest period, nor more than a total of 8 hours in any 7 consecutive days;
(b) the flight crew member shall be given a minimum of 10 hours notice of the assignment and shall not be assigned any duty for these 10 hours; or
(c) the air operator shall not assign the flight crew member to flight duty time and shall not interrupt the flight crew member's rest period between 22:00 and 06:00 local time.
(2) Where an air operator is unable to provide a flight crew member with a rest period required by subsection (1) and the flight crew member is notified to report for flight duty or the reporting time occurs between 22:00 and 06:00 local time:
(a) the maximum flight duty time shall be 10 consecutive hours; and
(b) the subsequent minimum rest period shall be increased by at least one-half the length of the preceding flight duty time.