The following structures shall be equipped, at the expense of the owner or operator, with a key lock box at an accessible location near the main entrance of the structure or at such location approved by the Fire Marshall of Caernarvon Township:
A.
All new commercial and industrial buildings of larger than 6,000 square feet for which building permits are issued after the effective date of this chapter;
B.
All existing commercial and industrial buildings within the Township which are served with an automatic fire alarm system or which are equipped with an automatic fire suppression system;
C.
Exception: any building having on-site, twenty-four-hour security personnel may, upon application, be exempted from the requirements of this section.