21. Non-continuous supervision shall be ensured by a stationary engineman who sees to the supervision, maintenance and verification of the stationary engine installation and of any other apparatus, components and piping used in the operation of such installation, and also, the supervision of other installations located on the same property and for which a periodic supervision only is permitted. However, the stationary engineman shall be present in the stationary engine-room or the control room during at least half of the time and the out-periods cannot exceed one hour per 2-hour period without the stationary engineman being replaced by a stationary engineman who holds a certificate in a class not more than one degree less than that required to supervise the operation of the installation as a chief stationary engineman.
R.R.Q., 1981, c. M-6, r. 1, s. 21.