There shall be an adequate enclosure either surrounding
the property or the swimming pool area, which shall be sufficient to make
the pool inaccessible to small children. Such enclosure, including gates,
must not be less than four feet above grade. All gates must be self-latching
with latches placed at least four feet above the ground or otherwise made
inaccessible from the outside to small children. A natural barrier, building,
hedge, pool cover or other protective device approved by the Building Official
may be used if the degree of protection afforded by the substituted device
or structure is not less than the protection afforded by the enclosure, gate
and latch described herein.