(d) Each house shall determine the rules of its
proceedings, judge the elections, returns and qualifications
of its members and choose its officers. No member shall be
expelled by either house, except by a vote of two-thirds of
the members elected to that house. A member may be expelled
only once for the same offense. Each house may punish by
imprisonment any person, not a member, guilty of disrespect
to the house by disorderly or contemptuous behavior in its
presence. Imprisonment shall not extend beyond twenty-four
hours at one time unless the person persists in disorderly or
contemptuous behavior.
Structure Illinois constitution