Certificate Required. No owner shall use or permit the use of any structure, or part thereof, created, erected, changed, converted or enlarged, wholly or partly, after June 18, 1961, until a Certificate of Occupancy shall have been issued by the Construction Official; such Certificate of Occupancy shall specifically indicate the proposed use and shall show that the building, or part thereof, and the proposed use thereof are in conformity with the provisions of this chapter. The Construction Official shall issue a Certificate of Occupancy provided that the building or a part thereof, and the proposed use thereof conform with all the requirements of the chapter.