Wash. Rev. Code § 85.05.610
Notwithstanding the provisions of *RCW 85.05.020, any diking or drainage district or diking and drainage district organized pursuant to chapter 85.05 RCW as now or hereafter amended, may annex and assume, or such district may be organized for the purpose of assuming, and may take over, maintain, operate and extend any diking and drainage systems which have been heretofore erected and operated or may be hereafter erected and operated by the government of the United States of America or any political subdivision or agency thereof, whenever the congress of the United States by permissive legislation authorizes the transfer of maintenance and operations functions to state and local nonfederal agencies.
RCW 85.05.610
*Reviser's note: RCW 85.05.020 was repealed by 1985 c 396 s 87. For special district creation and operation see chapter 85.38 RCW.
Severability-1967 c 184: "If any provision of this 1967 act, or its application to any person or circumstance is held invalid, the remainder of the act, or the application of the provision to other persons or circumstances is not affected." [ 1967 c 184 s 25.]