If you intend to use the Will Pair SB (Sleeper Berth) option, be aware that you are required to comply with the regulations according to the operating zone you are in. The Will Pair Sleeper Berth allows you to indicate that you intend to split your sleeper time to utilize the split sleeper regulations in Canada and the USA. Checking this box will update your available hours calculations to use optimistic clocks and exclude qualifying off duty and sleeper berth periods from the 14 hour work shift.