Certificate of habitability required. It shall henceforth be unlawful for any property owner, landlord or tenant to rent, lease or in any way deliver up for occupancy any building, premises, apartment or any other dwelling unit until a certificate of habitability to the effect that said building, premises, apartment or any other dwelling unit conforms to the provisions of this chapter shall have been issued by the Construction Official or his designee. In such case, it shall be the duty of the Construction Official or his designee to issue a certificate of habitability upon inspection and approval by a Code Enforcement Officer within 30 days after a written request for such certificate shall have been filed with the Building Department by a property owner, landlord or tenant of a building, premises, apartment or any other dwelling unit. Such certificate of habitability shall be effective for a period of time that the premises again becomes occupied and for as long as occupancy remains unchanged. If no inspection has been made within 30 days after a written request for same, then a temporary certificate of habitability shall be deemed to have been issued.