A. Where a zone boundary is indicated as approximately following a street, alley or highway, the centerline of the street, alley, or highway shall be construed to be the zone boundary.

B. Where a zone boundary is indicated as approximately following the dividing line between land and water, such line shall be construed to be the mean high water line.

C. Where a boundary line follows or coincides approximately with a lot line or a property ownership line, it shall be construed as following the lot line or property ownership line.

D. Where a boundary of a zone follows approximately the City limit line, such line shall be construed to be at the limit of the jurisdiction of the City, unless otherwise indicated.

E. Where uncertainty exists, the Planning Commission, upon written application therefor or on its own motion, shall determine the location of the boundary in question, giving consideration to the location and scale indicated on the zoning map, any legal descriptions from which the zoning map was prepared, and the objectives of the zoning regulations and the purposes set forth therein. In case of doubt as to the exact location, the zoning regulations of the more restrictive adjoining zone shall govern.

F. Zone boundaries shall extend vertically upward and downward from the existing or finished grade. (Ord. 89-1 § 1, 1989.)