Copies On File: Two copies of the official zoning map and, thereafter, two copies of the current annual revision thereto, are to be kept available for public inspection; one shall be kept in the office of the City Clerk, and the other shall be kept in the office of the code compliance officer, to the extent that such officer shall have a separate office from that of the City Clerk. Each such map shall be identified by the signature of the Mayor, attested by the City Clerk, and shall bear the seal of the City under the words: "This is to certify that this official zoning map adopted on (date of adoption of the map being replaced) is part of Title 10 of the municipal code, City of Le Roy, Illinois.