July 1, 2010 – When a landlord enters into a rental agreement creating a new tenancy in a dwelling unit that contains a carbon monoxide source or that is within a structure that contains a carbon monoxide source, the landlord must ensure the dwelling unit contains one or more properly functioning carbon monoxide alarms at the time the tenant takes possession of the dwelling unit. The landlord must provide a new tenant with alarm testing instructions. If the alarm is battery operated or has a battery backup system the landlord must supply working batteries for the alarm at the beginning of the new tenancy.
April 1, 2011 – All rental and dwelling units that have a carbon monoxide source or are located within a structure having a carbon monoxide source are required to have a carbon monoxide alarm.
April 1, 2011 – When conveying fee title or transferring possession under a land sale contract of a one and two family dwelling or multifamily housing that contains a carbon monoxide source, the dwelling or housing must have one or more properly functioning carbon monoxide alarms installed in locations that provide carbon monoxide detection for all sleeping areas.
April 1, 2011 – Carbon monoxide alarms are required in new construction or a structure that undergoes reconstruction, alteration or repair for which a building permit is required, and is identified in the structural specialty code as residential Group R structure.
For more information click here