S-2.1, r. 13 - Regulation respecting occupational health and safety
312.88. Diving in a restricted access area: Divers must comply with the following safety standards when diving in a restricted access area:
(1) the dive team must consist of at least 4 divers, including 1 diver, 1 standby diver and 2 diver’s tenders, 1 of whom is the diving supervisor;
(2) the diver’s tender who is not acting as diving supervisor must always be able to pull directly on the umbilical to return the diver to the surface, if required;
(3) the water flow must be completely controlled; and
(4) a diver lifting device meeting the requirements provided for in section 312.40 must be available on the surface, except if a diver is within easy reach.