(a)   No owner shall use or permit the use of any structure, building or land, or part thereof, hereafter created, erected, changed, converted or enlarged, wholly or partly, until a zoning certificate shall have been issued by the Zoning Inspector.  It shall be the duty of the Zoning Inspector to issue a certificate, provided he is satisfied that the structure, building or premises, and the proposed use thereof conform with all the requirements of this Zoning Ordinance.  No permit for excavation or construction shall be issued by the Zoning Inspector unless the plans, specifications and the intended use conform to the provisions of this Zoning Ordinance.
   (b)   Under written request from the owner or tenant, the Zoning Inspector shall issue a zoning certificate of any building or premises existing at the time of enactment of this section (Ordinance 871A, passed December 13, 1965), certifying, after inspection, the extent and kind of use made of the building or premises and whether such use conforms to the provisions of this Zoning Ordinance.  (Ord. 871A.  Passed 12-13-65.)