The initial zoning maps adopted with this Zoning Ordinance shall be entitled the Original Official Zoning Maps, and each Map shall be identified by the signature of the Mayor attested by the Clerk of Council, and bearing the seal of the City under the following words: "This is to certify that this is a part of the Original Official Zoning Maps referred to in Chapter 1113 of the Codified Ordinances of the City of Sylvania, Ohio, together with the date of the adoption of this Zoning Ordinance. The Original Official Zoning Maps shall be filed in the Zoning Administrator's office, shall remain without change as originally adopted by Council and shall be used only for reference purposes when there is a need to determine the original zoning.