; and (C) 2 members shall be appointed for a term of 6 years. (3) Vacancies Any member appointed to fill a vacancy occurring before the expiration of the term for which the member’s predecessor was appointed shall be appointed only for the remainder of that term. A member may serve after the expiration of that member’s term until a successor has taken office. (g) Basic pay (1) Rates of pay To the extent or in the amounts provided in advance in appropriation Acts, except as provided in paragraph (2), members of the Panel shall each be paid at a rate equal to the rate of basic pay for level III of the Executive Schedule. (2) Prohibition of additional compensation of Federal employees Members of the Panel who are full-time officers or employees of the United States may not receive additional pay, allowances, or benefits by reason of their service on the Panel. (3) Travel expenses Each member shall receive travel expenses, including per diem in lieu of subsistence, in accordance with applicable provisions under subchapter I of chapter 57 of title 5, United States Code. (h) Quorum A majority of the members serving on the Panel shall constitute a quorum. (i) Meetings The Panel shall meet at the call of the Chair or a majority of its members. (j) Director and staff (1) Director The Panel shall have a Director who shall be appointed by the Chair, in consultation with the other members of the Panel. (2) Staff The Director of the Panel may appoint such additional personnel as may be appropriate to carry out this section. (3) Compensation The Panel shall fix the compensation of the Director and other personnel of the Panel in accordance with title 5, United States Code, except that the rate of pay for the Director and other personnel may not exceed the rate payable for level IV of the Executive Schedule under section 5315 of that title. (k) Security clearance (1) Panel members and Director clearances To be eligible for appointment under subsection (d)(2) to serve as a member of the Panel, and to be eligible to serve as the