CO alarms are required in all newly constructed one- and two-family dwellings and town homes not more than three stories.
Effective date: July 1998
CO alarms are required in existing apartments, hotels and other group occupancies, as well as in rented one- and two-family dwellings.
Effective date: September 2012
CO alarms are required in all new multi-dwelling units, hotels and other group occupancies.
Effective date: January 2013