2 U.S. Code § 5306
2 U.S. Code § 5306 is about Deductions for absence. It is under Subchapter I (Member Pay) of Chapter 53 (House of Representatives Members) of Title 2 (The Congress) of the Code.
The Chief Administrative Officer of the House of Representatives (upon certification by the Clerk of the House of Representatives) shall deduct from the monthly payments (or other periodic payments authorized by law) of each Member or Delegate the amount of his salary for each day that he has been absent from the House, unless such Member or Delegate assigns as the reason for such absence the sickness of himself or of some member of his family.
