A certificate of occupancy shall be required for each building or structure whenever its use is changed from one occupancy class to another or for a part of a building or structure where its use is changed. Inspections shall be made in every case. The Building Official or his or her representative shall direct all interested agencies to make inspection within their several jurisdictions and attest to full compliance before a certificate of occupancy is issued. The owner shall be obligated to make application for all certificates of occupancy inspections and pay all charges for same. The owner shall make his or her premises comply to this code before allowing this change of occupancy.