(1) The provisions of RCW
74.60.090 is [are] severable from the remainder of this chapter, unless the condition stated in RCW
74.60.150(3)(c) occurs. The other provisions of this chapter are not severable; if the conditions set forth in RCW
74.60.150(1) cannot be satisfied or if the conditions set forth in RCW
74.60.150 (2) or (3) occur, this chapter, except for RCW
74.60.090, shall have no effect from that point forward.
(2) In the event that any portion of this chapter shall have been validly implemented and the entire chapter is later rendered ineffective under this section, prior assessments and payments under the validly implemented portions shall not be affected.