9.2.4. When the total duration of a working period is less than that listed in Columns 3 and 5 of Schedule 3.1, the rest period specified in Columns 4 and 6 respectively may be reduced in the ratio of the total working period to the maximum time permitted under Column 3 or 5, as the case may be.
R.R.Q., 1981, c. S-2.1, r. 6, s. 9.2.4.