; (ix) one shall be a representative of primary care physicians; and (x) one shall be a representative of health care professionals practicing in rural or underserved areas. (B) Term of service (i) In general Each member of the Panel shall serve a three-year term. A member may serve after the expiration of that member’s term until a successor has been appointed pursuant to subparagraph (A). (ii) Vacancy 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 vacancy in the Commission shall be filled in the manner in which the original appointment was made. (C) Pay Members of the Panel shall serve without pay. (D) Chairperson; Vice Chairperson (i) Chairperson The Secretary of Health and Human Services, or a designee of the Secretary, shall serve on the Panel as the Chairperson of the Panel. (ii) Vice Chairperson The Administrator of the Federal Emergency Management Agency, or a designee of the Administrator, shall serve on the Panel as the Vice Chairperson of the Panel. (5) Staff, experts, and consultants The Panel may— (A) appoint such staff as the Panel considers to be appropriate, without regard to the provisions of title 5, United States Code, governing appointments in the competitive service; (B) fix the pay of such staff, without regard to the provisions of chapter 51 and subchapter III of chapter 53 of such title relating to classification and General Schedule pay rates