312.45.1. Compressed breathing air or gas mixture supply system: Subject to sections 312.46 to 312.54, any compressed breathing air or gas mixture supply system and its components must comply with Clauses 6.1 to 6.6 of CAN/CSA Standard Z275.2-11, Occupational Safety Code for Diving Operations.
The employer must keep the maintenance record set up under Clause 6.1.1 (e) of that standard for a period of a least 5 years.