11. The water depth in metres shall be clearly marked on the deck in figures at least 100 mm, in a contrasting colour in the following locations:(a) at the deepest point;
(b) at the break between gentle and steep bottom slopes;
(c) at the shallow end.
However, the depth of the water for a pool for which plans were approved or that was built before 1 September 1978, may be marked in metres or in feet.
R.R.Q., 1981, c. S-3, r. 3, s. 11.