United States Code
USC most recently checked for updates: Jun 09, 2025
Rule 603.
Oath or Affirmation to Testify Truthfully
Before testifying, a witness must give an oath or affirmation to testify truthfully. It must be in a form designed to impress that duty on the witness’s conscience.
(Pub. L. 93–595, § 1, Jan. 2, 1975 , 88 Stat. 1934; Mar. 2, 1987 , eff. Oct. 1, 1987 ; Apr. 26, 2011 , eff. Dec. 1, 2011 .)
