19. Continuous supervision shall be ensured by a stationary engineman who shall not leave the stationary engine-room or the control room, unless he is 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. 19.