17. A team of drivers driving a heavy vehicle fitted with a sleeper berth may meet the mandatory hours of rest and daily hours of rest requirements of sections 9 and 13 by accumulating hours of rest in no more than 2 periods if
(1) neither period of rest is shorter than 4 hours;
(2) the total of the 2 periods of rest is at least 8 hours; and
(3) the rules prescribed by subparagraphs 3 to 7 of the first paragraph of section 16 are complied with.
No operator shall request, require or allow a driver to begin to drive again and no driver shall begin to drive again in accordance with the requirements of sections 9 and 13 without first taking at least 8 consecutive hours of rest.