Alabama Energy and Residential Code (2009 IRC Adoption):
One- and two-family dwellings and townhomes of not more than three stories are required to be equipped with CO alarms outside of each separate sleeping area and in the immediate vicinity of bedrooms in dwelling units. (Effective date: October 1, 2012)

State Adoption of 2015 International Fire Code and international Building Code:
Requires carbon monoxide detection in new schools and lodging establishments. (Effective Date: January 1, 2017)