924.14—District.

District means the applicable one of the following described subdivisions of the production area, or such other subdivisions as may be prescribed pursuant to § 924.31(m) :
(a) District 1 shall include all of the production area except Walla Walla, Columbia, Garfield, and Asotin Counties in the State of Washington, and Umatilla County in the State of Oregon.
(b) District 2 shall include the County of Umatilla in the State of Oregon and the Counties of Walla Walla, Columbia, Garfield, and Asotin in the State of Washington.