The barrier must completely surround the swimming pool and must obstruct access to the swimming pool.
The barrier must be at least 4 feet (48 inches) high.
In the case of an above-ground pool, the barrier may be at ground level or mounted on top of the pool structure; however, if the barrier is mounted on top of the pool structure, the space between the top of the pool structure and the bottom of the barrier cannot exceed 4 inches.
A building wall can form part of the required barrier. However, where a wall of a dwelling serves as part of the barrier, at least one of the following requirements must be satisfied:
The pool must be equipped with a powered safety cover
All doors with direct access to the pool through that wall must be equipped with an alarm or other means of protection, such as self-closing doors with self-latching devices, which are approved by the governing body
In the case of an above-ground pool, the pool structure itself can serve as a part of the required barrier, provided that the pool structure is sufficiently rigid to obstruct access to the pool. However, where an above-ground pool structure is used as a barrier or where the barrier is mounted on top of the pool structure, and the means of access is a ladder or steps, then:
The ladder or steps shall be capable of being secured, locked or removed to prevent access, or the ladder or steps shall be surrounded by a barrier
When the ladder or steps are secured, locked or removed, any opening created shall not allow the passage of a 4-inch-diameter sphere.
Barriers shall be located so as to prohibit permanent structures, equipment or similar objects from being used to climb the barriers.