(2) After June 30, 1982, the commission may prohibit residential open burning in areas of the state if the commission finds:
(a) Such prohibition is necessary in the area affected to meet air quality standards; and
(b) Alternate disposal methods are reasonably available to a substantial majority of the population in the affected area.
(3)(a) Nothing in this section prevents a local government from taking any of the following actions if that governmental entity otherwise has the power to do so:
(A) Prohibiting residential open burning;
(B) Allowing residential open burning on fewer days than the number of days on which residential open burning is authorized by the commission; or
(C) Taking other action that is more restrictive of residential open burning than a rule adopted by the commission under this section.
(b) Nothing in this section affects any local government ordinance, rule, regulation or provision that:
(A) Is more restrictive of residential open burning than a rule adopted by the commission under this section; and
(B) Is in effect on August 21, 1981.
(c) As used in this subsection, "local government" means a city, county, other local governmental subdivision or a regional air quality control authority established under ORS 468A.105. [Formerly 468.355]