312.49. Lines: Each line of the breathing mixture or oxygen supply system must
(1) be clearly identified to the diver supplied;
(2) include an easy-to-reach shockproof supply valve;
(3) be equipped with a pressure gauge, downstream from the supply valve, indicating the supply pressure of the breathing mixture or oxygen, with a dial and numbers easily readable by the diver’s tender.
For the purposes of this section, “lines” means the rigid and flexible hoses and fittings of the breathing mixture or oxygen supply and distribution system.
O.C. 425-2010, s. 3; O.C. 1104-2015, s. 8.