Oregon Revised Statutes Protection from Fire § 476.725

(1) The State Fire Marshal shall adopt rules establishing minimum standards for carbon monoxide alarms in one and two family dwellings and multifamily housing. The rules adopted by the State Fire Marshal may include, but need not be limited to, rules establishing minimum standards for the design, inspection, testing and maintenance of carbon monoxide alarms.

(2) The State Fire Marshal shall adopt rules establishing standards for the placement and location of carbon monoxide alarms in one and two family dwellings and multifamily housing that were not subject to state building code requirements for carbon monoxide alarm placement or location at the time of construction.

(3) In adopting rules under this section, the State Fire Marshal shall give consideration to state building code requirements and any standards adopted by national safety organizations.

(4) Notwithstanding ORS 476.030, State Fire Marshal rules adopted under this section shall apply for all governmental subdivisions in the state. A governmental subdivision, as defined in ORS 476.005 may not enact or enforce any local ordinance, rule or regulation regarding the design, inspection, testing, maintenance, placement or location of carbon monoxide alarms.