S-2.1, r. 4 - Safety Code for the construction industry

Full text Measuring devices: For the purposes of this Division, the noise level must be measured with a Type 2 sound level meter for general use or a Type 1 sound level meter for precision purposes, in compliance with one of the following standards, applicable at the time of manufacture of the sound meter:
(1)  Sound Level Meters, CSA Standard Z107.1;
(2)  Specification for Sound Level Meters, ANSI Standard S1.4A.
R.R.Q., 1981, c. S-2.1, r. 6, s.; O.C. 393-2011, s. 6.