B-1.1, r. 2 - Construction Code

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10.15. The water depth must be clearly marked on the deck in letters at least 100 mm high, in a contrasting colour, on each side of the basin and opposite
(a)  the deepest point;
(b)  the change in slope between the gentle and steep bottom slopes; and
(c)  the shallow end.
O.C. 115-2013, s. 1.