Article I, Section 6
The salaries of Senate and House members will set their own salaries in the form of a law and will be paid out of the U.S. Treasury. Members are granted "legislative immunity" which lets them speak and debate freely when in session. Members of Congress cannot be arrested while in attendance at their house session or while traveling to or from it, except in cases of treason, felony, and breach of peace.
No sitting member of either house can be appointed to an office in the executive or judicial branch that was created or increased in salary during that member's current elected term. Also, no member of Congress can hold an office in the executive or judicial branch during their Congressional term. Members may resign from Congress in order to accept positions in the other two branches.
© Copyright 1997 Jonathan Chin & Alan Stern
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.
No senator or representative shall, during the time for which he was elected, be appointed to any civil office under the authority of the United States, which shall have been created, or the emoluments whereof shall have been increased during such time; and no person holding any office under the United States, shall be a member of either house during his continuance in office.