[Amended 5-3-2011 by L.L. No. 17-2011]
(A) 
Single or multiple-station smoke alarms shall be installed and maintained in all residential or residentially-used dwelling units regardless of occupant load. Any owner or person-in-charge of a dwelling unit who fails, neglects or refuses to install and maintain such smoke alarms shall be deemed in violation of this chapter.
(B) 
Smoke alarms shall be installed and maintained on the ceiling or wall outside of each separate sleeping area in the immediate vicinity of bedrooms; and/or in each room used for sleeping purposes; and/or on each floor within a dwelling unit, including basements and cellars but not including crawl spaces and uninhabitable attics. In dwellings or dwelling units with split levels and without an intervening door between the adjacent levels, a smoke alarm installed on the upper level shall suffice for the adjacent lower level, provided that the lower level is less than one full story below the upper level. Any owner or person-in-charge of a dwelling unit who fails, neglects or refuses to install and maintain such smoke alarms shall be deemed in violation of this chapter.
(C) 
It shall be unlawful for an owner, occupant, or person-in-charge of property to fail, refuse or neglect to maintain smoke alarms in an operative condition at all times.
(A) 
In all residential or residentially-used dwellings, single-station smoke alarms shall receive their primary power from the building wiring, provided that such wiring is served from a commercial source and shall be equipped with a battery backup. Smoke alarms shall emit a signal when the batteries are low. Wiring shall be permanent and without a disconnecting switch other than as required for over-current protection. It shall be unlawful for an owner or person-in-charge of property to fail, refuse or neglect to provide or maintain smoke alarms which do not meet the requirements of this article.
[Amended 5-3-2011 by L.L. No. 17-2011]
(B) 
Exception. Smoke alarms are permitted to be solely battery operated in buildings where no construction is taking place, buildings that are not served from a commercial power source and in existing areas of buildings undergoing alterations or repairs that do not result in the removal of interior wall or ceiling finishes exposing the structure, unless there is an attic, crawl space or basement available which could provide access for building wiring without the removal of interior finishes.