312.6. Diving mode according to work: Surface-supply diving is required for the following:(1) work performed on a construction site within the meaning of section 1 of the Act respecting occupational health and safety (chapter S-2.1);
(2) welding or cutting;
(3) jetting or suction dredging;
(4) work requiring the use of a lifting device to handle loads underwater;
(5) work requiring the handling or use of explosives;
(6) deep diving work;
(7) work in a contaminated environment requiring the exceptional preventive measures referred to in sections 312.74 to 312.79;
(8) work involving dives with special hazards requiring the safety measures referred to in sections 312.86 to 312.91; and
(9) inspecting submerged structures or infrastructures.