The Board consists of 12 members appointed by the Secretary. In making appointments to the Board, the Secretary shall choose members of the Board so that the Board is fairly representative of the businesses and professions that are interested in the subject of radiation. The general public shall also be represented. Ten members shall be individuals who are recognized as knowledgeable about the subject of radiation. Two members shall be public members who represent the community at large. The term of a member is 4 years and begins on June 1. The terms of members are staggered as required by the terms provided for members of the Board on July 1, 1986. The terms of those members end as follows: 3 members in 1987; 2 members in 1988; 3 members in 1989; and 4 members, including 2 public members, in 1990. At the end of a term, a member continues to serve until a successor is appointed and qualifies. A member who is appointed after a term has begun serves only for the rest of the term and until a successor is appointed and qualifies.