SEC. 10. The Senate shall, at the beginning and close of each regular session, and at such other times as may be necessary, elect one of its members President _pro tempore_. The House of Representatives shall elect one of its members as Speaker. Each House shall choose its other officers, and shall judge of the election and qualification of its members.

SEC. 11. A majority of each House shall constitute a quorum, but a smaller number may adjourn from day to day, and compel the attendance of absent members.

The Legislative Manual, of the State of Colorado — Part 64

SEC. 12. Each House shall have power to determine the rules of its proceedings and punish its members or other persons for contempt or disorderly behavior in its presence; to enforce obedience to its process; to protect its members against violence, or offers of bribes, or private solicitation, and, with the concurrence of two-thirds, to expel a member, but not a second time for the same cause, and shall have all other powers necessary for the Legislature of a free State. A member, expelled for corruption, shall not thereafter be eligible to either House of the same General Assembly, and punishment for contempt or disorderly behavior shall not bar an indictment for the same offense.

The Legislative Manual, of the State of Colorado — Part 64

SEC. 13. Each House shall keep a journal of its proceedings, and may, in its discretion, from time to time, publish the same, except such parts as require secrecy, and the ayes and noes on any question shall, at the desire of any two members, be entered on the journal.

The Legislative Manual, of the State of Colorado — Part 64

SEC. 14. The sessions of each House, and of the committees of the whole, shall be open, unless when the business is such as ought to be kept secret.

SEC. 15. Neither House shall, without the consent of the other, adjourn for more than three days, nor to any other place than that in which the two Houses shall be sitting.

SEC. 16. The members of the General Assembly shall, in all cases except treason, felony, violation of their oath of office, and breach or surety of the peace, be privileged from arrest during their attendance at the sessions of their respective Houses, and in going to and returning from the same; and for any speech or debate in either House they shall not be questioned in any other place.

SEC. 17. No law shall be passed except by bill, and no bill shall be so altered or amended on its passage through either House as to change its original purpose.