; and (B) be a leading medical or scientific expert, or an otherwise authoritatively qualified expert, in one or more relevant fields. (3) Terms Each member of the Commission shall be appointed for the life of the Commission. (4) 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. A vacancy in the Commission shall be filled in the manner in which the original appointment was made. (5) No pay The members of the Commission shall serve without pay. Members of the Commission who are full-time officers or employees of the United States or Members of Congress may not receive additional pay, allowances, or benefits by reason of their service on the Commission. (6) Travel expenses Each member of the Commission 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. (7) Resources The Secretary shall ensure that appropriate personnel, funding, and other resources are provided to the Commission to carry out its responsibilities. (c) Meetings The Commission shall meet at least 4 times each year. (d) Staff of Federal agencies Upon request of the Commission, the head of any Federal department or agency may detail, without reimbursement, any of the personnel of that department or agency to the Commission to assist in carrying out this section. (e) Study The Commission shall— (1) study the programs and activities conducted pursuant to this Act