((a)) ** Vacancies in Advisory Board** Any vacancy in the Advisory Board shall not affect its duties under this title and shall be filled in the same manner as the original position.

((b)) ** Compensation and expenses of members of Advisory Board** Members of the Advisory Board shall serve without compensation, if not otherwise officers or employees of the United States, except that they shall, while away from their homes or regular places of business in the performance of services under this chapter, 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 sections 5701 through 5707 of title 5.

((c)) ** Authorization of appropriations** There are authorized to be appropriated annually such sums as Congress may determine necessary to carry out the provisions of and subsection (b) of this section.section 3127 of this title