; (ii) 4 members shall represent fire and rescue officials; (iii) 4 members shall represent emergency medical service officials; and (iv) 4 members shall represent 9–1–1 professionals. (B) Diversity of membership Members shall be representatives of State or Tribes and local governments, chosen to reflect geographic and population density differences as well as public safety organizations at the national level across the United States. (C) Expertise All members shall have specific expertise necessary for developing technical requirements under this section, such as technical expertise, and expertise related to public safety communications and 9–1–1 services. (D) Rank and file members In making the appointments required by subparagraph (A), the Assistant Secretary shall appoint a rank and file member from each of the public safety disciplines listed in clauses (i) through (iv) of such subparagraph as a member of the Board and shall select such member from an organization that represents its public safety discipline at the national level. (3) Period of Appointment (A) In general Except as provided in subparagraph (B), members of the Board shall serve for a 3-year term. (B) Removal for cause A member of the Board may be removed for cause upon the determination of the Assistant Secretary. (4) Vacancies Any vacancy in the Board shall be filled in the same manner as the original appointment. (5) Quorum A majority of the members of the Board shall constitute a quorum. (6) Chairperson and vice chairperson The Board shall select a Chairperson and Vice Chairperson from among the voting members of the Board. (7) Duty of board to submit recommendations Not later than 120 days after all members of the Board are appointed under paragraph (2), the Board shall submit to the Assistant Secretary recommendations for— (A) deploying Next Generation 9–1–1 in rural and urban areas; (B) ensuring flexibility in guidance, rules, and grant funding to allow for technology improvements