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The requirements of this title as to minimum site development standards shall not be construed to prevent a use as permitted in a respective zone of any parcel of land in the event such parcel was held in separate ownership prior to the effective date hereof. Each such parcel to be developed must have not less than sixteen feet (16') of frontage on a street, or as approved by the board of adjustment, and the density of development may not exceed that permitted by area requirements in the respective zone.
(1985 Code § 19-3-2)