Section R314.3 of the International Residential Code for One- and Two-Family Dwellings is hereby amended and shall read as follows:

R314.2 Location. Smoke alarms shall be installed in the following locations and in accordance with Chapter 29 of NFPA 72:

1. In each sleeping room.

2. Outside of each separate sleeping area in the immediate vicinity of the bedrooms within 21 ft of any door to a sleeping room, with the distance measured along a path of travel.

3. On each additional story of the dwelling, including basements and habitable attics and not including crawl spaces and uninhabitable attics. In dwellings or dwelling units with split levels and without an intervening door between the adjacent levels, a smoke alarm installed on the upper level shall suffice for the adjacent lower level provided that the lower level is less than one full story below the upper level.

4. Smoke alarms shall be installed not less than 3 feet horizontally from the door or opening of a bathroom that contains a bathtub or shower unless this would prevent placement of a smoke alarm required by this section.

5. Smoke alarms shall be installed not less than 3 feet horizontally from a supply register of a forced air heating or cooling system, or from the tip of the blade of a ceiling fan unless this would prevent placement of a smoke alarm required by this section.

6. Ceiling mounted smoke alarms shall be installed not less than 4-inches horizontally from a wall or other vertical obstruction. Wall mounted smoke alarms shall be installed not less than 4-inches, and not more than 12-inches from the ceiling.

7. Smoke alarms shall be installed in locations where they are accessible for testing and maintenance without special equipment.