Except when otherwise specifically provided for therein, the fire regulation standards adopted by this chapter shall not apply to any existing condition if:
A. Such existing condition was legally established prior to the enactment or amendment of such standards;
B. Such existing condition is carried on in accordance with the standards, if any, in effect at the time the existing condition was first established; and
C. Such existing condition has been determined by the fire marshal not to be hazardous to life or property.
(Ord 1752 §3 (part), Ord. 2491 §13 (part))