Each house may determine the rules of its own proceedings, punish for contempt and disorderly behavior, and, with the concurrence of two-thirds of all the members elected, expel a member, but no member shall be expelled a second time for the same offense.
Rules of Procedure
Wash. Const. art. II, § 9 — under Legislative Department.
Wash. Const. art. II, § 9
Rules of Procedure