RCW 17.12.040
Designation of district.
If the board shall deem the interests of the county or of any particular section thereof will be benefited by the creation of such a district or districts, or the changing thereof, it shall make a record thereof upon the minutes of the board and shall designate such territory in each such district as “Pest District . . . . . . for . . . . . . County”.
[ 1919 c 152 § 4; RRS § 2804.]