Except as otherwise provided in this Code, no person shall cover or conceal or cause to be covered or concealed any new construction, electrical, plumbing, or mechanical systems or apparatus for which a permit has been issued, until such new construction, electrical, plumbing, or mechanical systems or apparatus have been inspected and approved as required by this Code. The Construction Services Administrator shall have authority to remove or cause the removal of any obstructions which may prevent the proper inspection of new construction, electrical, plumbing, or mechanical systems or apparatus. Upon the completion of the new construction, electrical, plumbing, or mechanical systems or apparatus in any building, it shall be the duty of the company, firm, or individual doing the same to notify the Construction Services Administrator, who shall inspect the same on receipt of such notice for conformance to the provisions of this Code. Certificates of Occupancy shall not be issued unless the new construction, electrical, plumbing, or mechanical systems or apparatus are in conformity with the rules and regulations set forth in this Code.