The Fire Marshal may establish a program for the periodic inspection of all occupancies of commercial buildings for compliance with the fire regulations. The Fire Marshal may adopt a policy regarding the frequency, priority, and type of inspection of occupancies in commercial buildings subject to the availability of budgeted funds and staff. The Fire Marshal or the Fire Marshal’s designees may, at all reasonable hours, enter into all buildings and upon all premises, except private residences, to conduct an inspection to determine if fire hazards exist.