Section 16-231-413. What are the boundaries and restrictions for Area 1 in Columbia County?
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(1) Area 1 description. That area within a distance of one-half mile of the city limits of Dayton.
(2) Area 1 restrictions. Aircraft applications of use restricted herbicides are prohibited on and after April 5 through October 31: Provided, That upon written request to the Washington state department of agriculture, aircraft applications by permit shall be considered for purposes of critical weed control.