Iowa Constitution
Article III - OF THE DISTRIBUTION OF POWERS.
§ 9 Authority of the houses.

Each house shall sit upon its own adjournments, keep a journal of its proceedings, and publish the same; determine its rules of proceedings, punish members for disorderly behavior, and, with the consent of two thirds, expel a member, but not a second time for the same offense; and shall have all other powers necessary for a branch of the general assembly of a free and independent state.
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