The President of the Senate, the Speaker of the House of Representatives, or a chairman of any joint committee established by a joint or concurrent resolution of the two Houses of Congress, or of a committee of the whole, or of any committee of either House of Congress, is empowered to administer oaths to witnesses in any case under their examination.Any member of either House of Congress may administer oaths to witnesses in any matter depending in either House of Congress of which he is a Member, or any committee thereof.
Structure US Code
CHAPTER 6— CONGRESSIONAL AND COMMITTEE PROCEDURE; INVESTIGATIONS
§ 190. Repealed. S. Res. 4, § 301(b),
§§ 190a to 190a–2. Repealed. S. Res. 274, § 2(a),
§ 190a–3. Repealed. S. Res. 9, § 2,
§§ 190b, 190c. Repealed. S. Res. 274, § 2(a),
§ 190d. Legislative review by standing committees of the Senate and the House of Representatives
§ 190f. General appropriation bills
§ 190g. Nonconsideration of certain private bills and resolutions
§ 190h. Repealed. S. Res. 9, § 2,
§§ 190i to 190k. Repealed. S. Res. 274, § 2(b),
§ 190l. Private claims pending before Congress; taking of testimony
§ 190m. Subpoena for taking testimony; compensation of officers and witnesses; return of depositions
§ 192. Refusal of witness to testify or produce papers
§ 194. Certification of failure to testify or produce; grand jury action
§ 195. Fees of witnesses in District of Columbia
§ 196. Senate resolutions for investigations; limit of cost