; and (H) use the United States mails in the same manner and under the same conditions as other Executive agencies. (2) Enforcement of subpoena A subpoena issued under paragraph (1)(C)(iii) may be enforced by any appropriate Federal court acting pursuant to a lawful request of the Review Board. (j) Witness immunity The Review Board shall be considered to be an agency of the United States for purposes of section 6001 of title 18, United States Code. Witnesses, close observers, and whistleblowers providing information directly to the Review Board shall also be afforded the protections provided to such persons specified under section 1673(b) of the James M. Inhofe National Defense Authorization Act for Fiscal Year 2023 ( 50 U.S.C. 3373b(b) ). (k) Oversight (1) Senate The Committee on Homeland Security and Governmental Affairs of the Senate shall have continuing legislative oversight jurisdiction in the Senate with respect to the official conduct of the Review Board and the disposition of postponed records after termination of the Review Board, and shall have access to any records held or created by the Review Board. (2) House of Representatives Unless otherwise determined appropriate by the House of Representatives, the Committee on Oversight and Accountability of the House of Representatives shall have continuing legislative oversight jurisdiction in the House of Representatives with respect to the official conduct of the Review Board and the disposition of postponed records after termination of the Review Board, and shall have access to any records held or created by the Review Board. (3) Duty to cooperate The Review Board shall have the duty to cooperate with the exercise of oversight jurisdiction described in this subsection. (4) Security clearances The Chairmen and Ranking Members of the Committee on Homeland Security and Governmental Affairs of the Senate and the Committee on Oversight and Accountability of the House of Representatives, and staff of such committees designated by such Chairmen and Ranking