12-1-7: ZONING MAP:
   A.   The boundaries of the zoning districts are indicated upon the official zoning map of Mason City, which is made a part of this title by reference hereto. The official zoning map and all the notations, references and other matters shown thereon is hereby declared to be a part of this title, and amendments to the map shall be in accordance with the process and requirements of chapter 4 of this title. The official zoning map shall be on file in the Office of the City Clerk and shall bear the signature of the Mayor attested to by the City Clerk.
   B.   If, in accordance with the provisions of this title, changes are made in zoning district boundaries or other matters portrayed on the official zoning map, the ordinance number and date of said change shall be recorded on the official zoning map.
   C.   Zoning district boundaries shall generally follow parcel lines, lot lines, street right-of-way centerlines, railroad right-of-way centerlines, the center of streams, City limits, and other preexisting elements, when practical.
   D.   The Administrative Official shall have the power to interpret the location of zoning district boundaries where the location of such lines is not clearly discernible from the official zoning map. Upon making such a determination, the official zoning map shall be corrected so that the boundaries in question are clearly discernible.
   E.   In the case of a lot of record under one (1) ownership that is divided by a zoning district boundary, each portion of the lot shall be governed by the zoning district applied thereto. Alternatively, the entire parcel may be used as permitted by the regulations applicable to the most restrictive classification. (Ord. 10-003, 1-19-2010, eff. 7-1-2010; amd. 2017 Code)