(a) Upon completion of all projects for which a building or demolition permit has been issued, the property owner shall obtain a certificate of occupancy or completion. No building erected subject to the Uniform Code and this Part shall be used or occupied, except to the extent provided in this section, until a certificate of occupancy has been issued. No building similarly provided in this section, until a certificate of occupancy has been issued. No building similarly enlarged, extended, or altered, or upon which work has been performed which required the issuance of a building or demolition permit shall be occupied or used for more than 30 days after the completion of the alternation or work unless a certificate of occupancy or certificate of completion has been issued.

(b) No change shall be made in the nature of the occupancy of an existing building unless a certificate of occupancy authorizing the change has been issued. The owner or occupant of such building must demonstrate that such change will conform with all applicable provisions of the Uniform Code before a certificate of occupancy will be issued.

(c) A temporary certificate of occupancy may be issued if the building or structure or a designated portion of a building or structure is sufficiently complete so that it may be safely put to the use for which it is intended. A temporary certificate of occupancy shall expire six months from the date of issuance or at an earlier date if specified thereon. A temporary certificate of occupancy may, at the discretion of the Department of State, be renewed an indefinite number of times.

(d) No certificate of occupancy or completion shall be issued unless: