Wash. Rev. Code § 48.125.040
(1) In addition to the requirements under RCW 48.125.030, self-funded multiple employer welfare arrangements are subject to the following requirements:
(b) Arrangements must satisfy one of the following requirements:
(i)
(ii) The arrangement demonstrates to the reasonable satisfaction of the commissioner the ability of the arrangement to remain financially solvent, for which purpose the commissioner may consider:
[ 2004 c 260 s 6.]