The Official Zoning Map shall be identified by the City Seal and the signature of the Mayor under the following words: "This is to certify that this map is the Official Zoning Map of the City of Galax," together with the adoption date of this chapter.

All changes made in district boundaries or other matters shown on the Official Zoning Map must be in accordance with the provisions of this chapter and the Code of Virginia 1950, as amended, and shall be entered on the Official Zoning Map promptly after the amendment has been approved by the City Council. No amendment to this chapter which involves a change on the Official Zoning Map shall become effective until such change has been recorded on the map. A brief statement shall be included describing the nature of the change and date of adoption and signed by the Mayor.

No changes of any kind shall be made on the Official Zoning Map or matters shown thereon except in conformity with the procedures set forth in this chapter. Any unauthorized change shall be considered a violation of this chapter and punishable as a misdemeanor.

The Official Zoning Map shall be located in the office of the Zoning Administrator and shall be the final authority as to the current zoning status of areas within the corporate limits, regardless of other purported copies of the Official Zoning Map which may be in existence. An official copy shall also be kept in Council chambers.

Boundaries indicated as approximately following the center lines of railroads, streams, streets, roads or alleys shall be interpreted as following such center lines.

Boundaries indicated as approximately following platted lot lines shall be interpreted as following such lot lines and the extension of lot lines in the event that the boundary extends across unplatted tracts.

Boundaries indicated as approximately following corporate limits shall be interpreted as following such corporate limits.

Boundaries indicated as approximately following the center lines of streams, river, lakes or other bodies of water shall be interpreted as following such center lines and, in the event of a change in the course of a body of water, shall be interpreted as moving with the actual center line.

Boundaries indicated as parallel to or extensions of features indicated above shall be so interpreted. Distances not specifically indicated on the Official Zoning Map shall be determined by the scale of the map.

Where natural or man-made features actually existing differ with those shown on the Official Zoning Map, the Planning Commission shall determine the district boundary.

Where a district boundary line divides a lot which was in single ownership at the time of passage of this chapter, the Planning Commission may permit, as a special exception, the extension of the regulations for either portion of the lot, not to exceed 50 feet beyond the district line into the remaining portion of the lot.