State and local authorities, safety and consumer advocates, disability organizations, engineers, labor organizations, environmental experts, a representative of the National Highway Traffic Safety Administration, and other members determined to be appropriate by the Secretary. Any subcommittee of the Council shall be composed of not less than 15 and not more than 30 members appointed by the Secretary. (c) Terms Members of the Council shall be appointed by the Secretary of Transportation and shall serve for a term of three years. (d) Vacancies Any vacancy occurring in the membership of the Council shall be filled in the same manner as the original appointment for the position being vacated. The vacancy shall not affect the power of the remaining members to execute the duties of the Council. (e) Duties and subcommittees The Council may form subcommittees as needed to undertake information gathering activities, develop technical advice, and present best practices or recommendations to the Secretary regarding— (1) advancing mobility access for the disabled community with respect to the deployment of automated driving systems to identify impediments to their use and ensure an awareness of the needs of the disabled community as these vehicles are being designed for distribution in commerce