S-2.1, r. 13 - Regulation respecting occupational health and safety

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312.34. Maintenance logbook: Maintenance information on the diving equipment and material, including the breathing mixture supply system, such as a description of the location and the material maintained, the date of the maintenance as well as the name of the person doing the work, must be recorded in a logbook.
The logbook must be retained by the employer for at least 5 years.
O.C. 425-2010, s. 3.