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In all districts, as indicated, the location of primary business entrances, show windows, or signs shall be subject to the provisions of this Section. For the purposes of this Section, a lot of record or a group of contiguous lots of record held in single ownership or control at December 15, 1961, or any applicable amendment thereto, shall be considered a single zoning lot, regardless of any subsequent subdivision.

For the purposes of this Section, a corner lot shall include the entire zoning lot, notwithstanding the 100 foot limitation in the definition of corner lots in Section 12-10 (DEFINITIONS). All other zoning lots shall be considered zoning lots with single frontage.

The provisions of this Section shall not apply to:

(a)        vehicular entrances or exits for permitted drive-in uses or automotive service establishments or for permitted or required accessory off-street parking spaces or loading berths;

(b)        service entrances, or other entrances less than 3 feet, 6 inches in width;

(c)        windows other than show windows; or

(d)        ventilators, fire escapes or other appurtenances required by law.