on such Committee, except for the purposes of the following: (1) Chapter 81 of title 5. (2) Chapter 171 of title 28 and any other Federal law relating to tort liability. (c) Acceptance of volunteer services Notwithstanding any other provision of law, a member of the Committee may serve on such committee on a voluntary basis without pay. (d) Status of members (1) In general Except as provided in paragraph (2), with respect to a member of the Committee whom the Commission appoints to represent an entity or group— (A) the member is authorized to represent the interests of the applicable entity or group