In all cases of assessments for improvements under this chapter, wherein such assessment shall have failed to be valid in whole or in part for want of form or insufficiency, informality or irregularity, or nonconformance with the provisions of this chapter, the board is hereby authorized to cause such assessments to be reassessed and to enforce their collection in accordance herewith.

Assessment procedure: RCW 91.08.270 through 91.08.380.