312.42. Compressed breathing air, pure gases and gas mixtures: Subject to the second paragraph, compressed breathing air, pure gases and gas mixtures supplying diving equipment must comply with the requirements of Clauses 184.108.40.206, 220.127.116.11, 4.8, 4.9, 4.10, 4.11.1 and 4.11.6 of CAN/CSA Standard Z275.2-11, Occupational Safety Code for Diving Operations.
Gases and gas mixtures may not have particles exceeding 0.3 µm.
O.C. 425-2010, s. 3; O.C. 1104-2015, s. 5.