(1) Wading pools for children shall be physically separated from swimming pools by means of at least a 4-foot high barrier. A barrier shall be provided on the outside of the deck area of all outdoor wading pools and shall meet the following requirements:

(a) Barriers shall not allow passage of a 4-inch or greater diameter sphere through the barrier;

(b) The maximum clearance at the bottom of the barrier shall not exceed four inches;

(c) Barriers shall be located beyond the minimum deck space requirements, but shall be located so that the area intended for waders can be isolated from other pools;

(d) The wading pool shall be visible through the barrier;

(e) Barriers shall be equipped with self-closing gates or doors with self-latching closers and locking mechanisms and shall be constructed so that all gates or doors in the barrier open out from the wading pool; and

(f) Barriers shall be impenetrable for small children and must not offer any external handholds or footholds.