The Zoning Inspector shall act upon all such applications on which he is authorized to act by the provisions of this Zoning Ordinance within thirty days after they are filed in full compliance with all the applicable requirements. He shall either issue a zoning certificate within thirty days
or shall notify the applicant in writing of his refusal of such certificate and the reasons therefore. Failure to notify the applicant in case of such refusal within thirty days shall entitle an applicant to a zoning certificate, unless the applicant consents to an extension of time.