31 U.S.C. § 1346 — Commissions, councils, boards, and inter­agency and similar groups

(a) Unless this section provides otherwise, public money and appropriations may not pay (1) the pay or expenses of a commission, council, board, similar group, or member; expenses connected with that group’s work or results; or the detail or cost of an executive-agency officer’s or employee’s services for the group; or (2) an accounting or disbursing official may not approve or pay a related account or charge without a special appropriation. (b) An executive agency’s appropriations may pay an interagency group’s expenses when the group performs activities of common interest to executive agencies and includes a representative of that agency. The representatives receive no extra pay for membership. An executive-agency officer or employee who is not a representative may not receive extra pay for serving the group. (c) Subject to section 1347, this section does not apply to groups authorized by law; armed-forces courts-martial or courts of inquiry; or the foreign-relations contingent fund available to the President.