Any parcel of land with an area or width less
than that prescribed for a lot in the zone in which such a lot is
located may be used as a lot for any purpose permitted in the zone,
provided that the minimum area requirements for such lot shall be
50% of the area and width requirements for the zone in which located,
and further provided that all other regulations prescribed for the
zone by this chapter are complied with. Lots which are not of the
required minimum area or width may be used for any purpose permitted
in the zone in which they are located.