Section 5 - The Text
Each House shall be the Judge of the Elections, Returns and Qualifications of its own Members, and a Majority of each shall constitute a Quorum to do Business; but a smaller Number may adjourn from day to day, and may be authorized to compel the Attendance of absent Members, in such Manner, and under such Penalties as each House may provide.
Each House may determine the Rules of its Proceedings, punish its Members for disorderly Behavior, and, with the Concurrence of two thirds, expel a Member.
Each House shall keep a Journal of its Proceedings, and from time to time publish the same, excepting such Parts as may in their Judgment require Secrecy; and the Yeas and Nays of the Members of either House on any question shall, at the Desire of one fifth of those Present, be entered on the Journal.
Neither House, during the Session of Congress, 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.
Section 5 - The Meaning
The House of Representatives and the Senate are each in charge of deciding whether an election of one of their members is legitimate. They may call witnesses to help them decide. Similarly, the House and Senate may establish their own rules, punish members for disorderly behavior and, if two-thirds agree, expel a member.
To do business, each chamber needs a quorum, which is a majority of members present. A full majority need not vote, but must be present and capable of voting.
Both bodies must keep and publish a journal of their proceedings, including how members voted. Congress may decide that some discussions and votes are to be kept secret, but if one-fifth of the members demand that a vote be recorded, it must be. Neither the House nor the Senate may close down or move proceedings from their usual location for more than three days without the other chamber's consent.