Chapter 123 of the Acts of 2005
New and existing single- and multi-family dwellings, boarding houses, hotels, motels, dormitories, apartments, and adult and child care facilities are required to be equipped with CO detection devices, in conformance with requirements of the Board of Fire Prevention Regulations. (Effective dates: March 31, 2006 for battery-powered; January 1, 2007 for hard-wired)