A. A person in charge of property on which a swimming pool is situated shall maintain on the lot and completely surrounding the pool an enclosure consisting of a fence or wall not less than four feet in height. The fence shall be constructed so that it does not have openings, holes or gaps larger than four inches in any dimension except for doors and gates. If a picket fence is used, the openings between the pickets shall not exceed four inches in width. A dwelling house or accessory building may be used as part of the enclosure. The enclosure shall be of a pattern and type to discourage children climbing, that is incapable of being crawled under and that is sufficient to make the pool inaccessible to small children. No enclosure shall be nearer than three feet to the outer walls of a swimming pool.

B. All gates or doors opening through the enclosure shall be equipped with a self-closing and self-latching device installed at least 40 inches above the ground or base, designed and capable of keeping the door or gate securely closed at all times when not in actual use; except, that the door of a dwelling occupied by human beings and forming a part of the enclosure required need not be so equipped.