Pub. L. 91-648, tit. V, sec. 508
advisory committees
advisory committees Sec. 508. (a) The Commission may appoint, without regard to the provisions of title 5, United States Code, governing appointments in the competitive service, such advisory committee or committees as it may determine to be necessary to facilitate the administration of this Act. (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, United States Code, for individuals in the Government service employed intermittently.