42 U.S.C. § 4768: Advisory committees; appointment; compensation and travel expenses

(a) The Office may appoint, without regard to the provisions of title 5 governing appointments in the competitive service, such advisory committee or committees as it may determine to be necessary to facilitate the administration of this chapter. (b) Members of advisory committees who are not regular full-time employees of the United States, while serving on the business of the committees including traveltime may receive compensation at rates not exceeding the daily rate for GS–18; and while so serving away from their homes or regular places of business may be allowed travel expenses, including per diem in lieu of subsistence, as authorized by section 5703 of title 5 for individuals in the Government service employed intermittently.