Where a boundary line is shown as approximately following the center line of a street or highway, a street line or highway right-of-way line, such center line, street line or right-of-way line shall be construed to be such boundary. The boundary line will be changed automatically whenever the center line, street line or highway right-of-way line is changed, provided that the change does not exceed 20 feet.

Where a boundary line is shown as following a lot line, such lot line shall be construed to be the boundary.

Where a boundary line is shown as following a railroad line, such boundary shall be deemed to be located as the center line of such railroad line easement, right-of-way, property, etc.

Where a district boundary line is shown as approximately following the township limits, such boundary shall be construed to be the township limits.

Where a boundary line follows a stream, such boundary shall be deemed to be the center line of the stream. For any lake, pond, reservoir, river or other body of water, the regulations of the district in which they are located shall apply.

Where a boundary line is shown as approximately parallel to a street, highway, stream, or railroad line, such boundary shall be construed as being parallel thereto and at such distance from the center line thereof as indicated on the zoning map.