The Board of Appeals consists of a chairman and 2 associate members. Subject to the approval of the Governor, the Secretary shall appoint the chairman and the 2 associate members of the Board of Appeals. Before taking office, each appointee to the Board of Appeals shall take the oath required by Article I, § 9 of the Maryland Constitution. The term of a member is 6 years and begins on June 1. The terms of members are staggered as required by the terms provided for members of the Board of Appeals on October 1, 1990. At the end of a term, a member continues to serve until a successor is appointed and qualifies. A vacancy that occurs during a term shall be filled by the Secretary with the approval of the Governor. 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. If the position of chairman of the Board of Appeals is vacant, the Secretary, subject to the approval of the Governor, may appoint 1 of the associate members to be chairman for the rest of the term of the associate member.