Wash. Rev. Code § 23.100.0109
(2) The matters referred to in (a) through (k) of this subsection may be varied only in the articles of organization. The articles may:
(3) The matters referred to in (a) through (y) of this subsection may be varied only in the organic rules. The organic rules may:
(x) Increase the percentage of votes required for board of director approval of:
(y) Vary the percentage of votes required for members approval of:
[ 2019 c 37 s 109.]