Members of the Committee shall each be entitled to receive compensation not to exceed the daily rate for a GS-18 for each day (including traveltime) during which they are engaged in the actual performance of the duties of the Committee. In addition, while away from their homes or regular places of business in the performance of the duties of the Committee, each member of the Committee shall be allowed travel expenses, including per diem in lieu of subsistence, in the same manner as persons employed intermittently in the Government service are allowed expenses under section 5703(b) ¹ of title 5.