Where uncertainty exists as to the boundaries of any of the aforesaid districts, as shown on the zoning map, the following rules shall apply:
(A) Where the district boundaries are indicated as approximately following street, alley or highway lines, the lines shall be construed to be the boundaries.
(B) Where district boundaries are so indicated that they approximately follow lot lines, the lot lines shall be construed to be the boundaries.
(C) Where district boundaries are so indicated that they are approximately parallel to the centerlines of streets, alleys, or highways, or the right-of-way of the same, the district boundaries shall be construed as being parallel thereto and at a distance therefrom as indicated on the zoning map.
(D) Where district boundaries are indicated as approximately following the centerlines of streets or highways, street lines or railroad right-of-way lines or these lines extended, the centerline, street lines or railroad right-of-way lines shall be construed to be the boundaries.
(E) Where a district boundary line divides a lot or tract in single ownership, the district requirements for the least restricted portion of the lot or tract shall be deemed to apply to the whole thereof, provided the extensions shall not include any part of a lot or tract more than 50 feet beyond the district boundary line. The term “least restricted” shall refer to all zoning restrictions.
(F) In unsubdivided property, the location of zoning boundaries shall be determined by use of the scale appearing on the map.
(G) In subdivided property, the location of zoning boundaries shall be construed to be the nearest parallel lot line. However, if the zoning boundaries lie at a scaled distance greater than 25 feet from any parallel or approximately parallel lot line, the boundary shall be determined by use of the scale;
(H) In case any further uncertainty exists, the Board of Adjustment shall interpret the intent of the zoning map as to location of the boundaries.
(`94 Code, App. C, Art. V, § 5)