If, upon reviewing an application for a certificate of nonconformity, the Code Enforcement Officer shall determine that the use, structure or sign in question was lawfully existing at the time of the adoption of the provision creating the nonconformity in question and remains lawfully existing subject only to such nonconformity at the time of such application, and that any required affidavit is in order, he/she shall issue a certificate evidencing such facts and setting forth the nature and extent of the nonconformity and the date, if any, upon which such nonconformity is required to be terminated; otherwise he/she shall decline to issue such certificate and shall declare such building, structure or sign to be in violation of this chapter.