9. Pools shall be surrounded by a deck adjacent to the top of the walls. This deck shall:
(a) be covered with a non-slip surface finish;
(b) have a minimum clear width of 1.5 m and provide a clear passage of at least 900 mm behind the spring board or diving platform and its supporting structure; and
(c) be enclosed by a guardrail having a minimum height of 900 mm if a drop greater than 600 mm exists between the level of the deck and the ground level where the pool is situated.