Recently there has been a discussion regarding "single station" smoke detectors per the requirements of LS.02.01.34 EP-4 and the NFPA Life Safety Code.  LS.02.01.34 EP-4 is a catch-all phrase directing you to the Life Safety Code; i.e. “The organization meets all other Life Safety Code (LSC) fire alarm requirements related to NFPA 101-2000: 18/19.3.4 and is a C scored item.”  Looking at LSC reference 19.3.4 Detection, Alarm, and Communications Systems section 19.3.4.2 *Initiation section discusses initiation by manual or detection devices,  manual pull boxes in patient sleeping areas, and commercial cooking protection.  There is an appendix statement in 19.3.4.2 which states “It is not the intent of this Code to require single station smoke-detectors, which might be required by local codes, to be connected to initiate the building fire alarm system.”  This statement could then be translated to mean unsupervised sleeping areas require battery powered single station smoke-detectors.  Looking at section 19.3.4.3 Notification section talks about automatic notification and discusses audible and visual alarms in critical care areas, and visual alarms in patient sleeping areas approved by the AHJ.