<P> Neither House may adjourn, without the consent of the other, for more than three days . Often, a House will hold pro forma sessions every three days; such sessions are merely held to fulfill the constitutional requirement, and not to conduct business . Furthermore, neither House may meet in any place other than that designated for both Houses (the Capitol), without the consent of the other House . </P> <P> The Senators and Representatives shall receive a Compensation for their Services, to be ascertained by Law, and paid out of the Treasury of the United States . They shall in all Cases, except Treason, Felony and Breach of the Peace, be privileged from Arrest during their Attendance at the Session 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 . </P> <P> Senators and Representatives set their own compensation . Under the Twenty - seventh Amendment, any change in their compensation will not take effect until after the next congressional election . </P> <P> Members of both Houses have certain privileges, based on those enjoyed by the members of the British Parliament . Members attending, going to or returning from either House are privileged from arrest, except for treason, felony or breach of the peace . One may not sue a Senator or Representative for slander occurring during Congressional debate, nor may speech by a member of Congress during a Congressional session be the basis for criminal prosecution . The latter was affirmed when Mike Gravel published over 4,000 pages of the Pentagon Papers in the Congressional Record, which might have otherwise been a criminal offense . This clause has also been interpreted in Gravel v. United States, 408 U.S. 606 (1972) to provide protection to aides and staff of sitting members of Congress, so long as their activities relate to legislative matters . </P>

How can congress make laws other than those specifically mentioned in the us constitution