The boundaries of the use districts established by this title are shown on official zoning maps, which shall be maintained by the director of planning and facilities. The official zoning maps and all amendments, certifications, citations, and other matters entered on the official zoning maps are hereby a part of this code and have the same legal effect as if fully set out herein. The official zoning maps shall be identified by the signature of the chairman of county council and attested by the clerk to council. (Ord. 99-O-25 § 1.3, 1999)