This subpart is not retroactive unless, after investigation, the fire marshal deems it necessary to exercise the powers set forth in § 14.22 (relating to powers of the fire marshal). Approvals previously issued shall be continued in full force and effect if the requirements of this subpart in force at the time of the approval are met, except that this subpart may be applied retroactively whenever the fire marshal, after investigation and in order to protect life and property, deems it necessary to exercise the powers set forth in § 14.22.
34 Pa. Code § 14.5