54. Operating hours: It is prohibited to dynamite between 7:00 p.m. and 7:00 a.m. in a quarry situated less than 600 m from a structure or immovable referred to in section 11, even if such quarry is already in operation on l7 August 1977.
R.R.Q., 1981, c. Q-2, r. 2, s. 54.