(a)   In existing dwelling units, power supply to the smoke detector may be provided by a self monitored battery or the smoke detector may be wired directly to the dwelling's power supply (hardwired) in accordance with the National Fire Protection Association Standard 70.
   (b)   As an alternative to self-contained smoke detectors, an approved fire alarm system may be installed.
(Ord. 12-1992. Passed 3-26-92.)