(2) The Director of the Department of Consumer and Business Services shall by rule establish criteria for determining the lowest flooring of a building for the purposes of the definition of "affected buildings" provided by ORS 447.210 and for the purposes of ORS 447.247. [1971 c.320 §6; 1973 c.539 §8; 1979 c.133 §5; 1993 c.503 §10; 1993 c.744 §76; 1995 c.307 §4]