(a) Lockboxes are required on structures that are required to have fire department alarm systems and on multifamily residences having enclosed common areas to which the fire department, in an emergency, may need to gain access. The public safety keybox system shall contain keys for elevator return and door opening, elevator rooms, fire alarm box room, electrical rooms and any other keys necessary for the fire department to gain access to common areas or through common areas to individual units. The keybox system shall not require keys of individual units.

(b) The keybox system may be surface mounted or flush mounted in an easily accessible location, and the fire department shall maintain possession of the only key. If locks are changed in any of the rooms mentioned in subsection (a) of this section, the fire department shall be notified immediately. All keybox systems must be approved by the fire chief.