The Official Zoning Map shall be identified by the signature of the Chairman of the Board of Supervisors, attested by the Township Secretary, and shall bear the Seal of the Township under the following words: "This is to certify that this is the Official Zoning Map referred to in Part 1 of Ordinance Number 117, as amended by Ordinance Number 430, of the Township of Richland, Allegheny County, Pennsylvania," together with the date of adoption of this chapter.