Single mobile homes on individual lots shall be permitted in
any residential district as a single-family detached dwelling when
such mobile home is: 1) bolted to a continuous eight-inch concrete-block
foundation placed upon a continuous sixteen-inch-by-eight-inch concrete
footing located three feet below grade; or 2) has its main beams strapped
to concrete or block piers which have a bottom extending three feet
below grade. All mobile homes mounted without a full outside continuous
block foundation shall be required to install rigid, architecturally
sound and attractive full perimeter skirting.