The Governor shall appoint one substitute member to the Board. The appointment shall be made: if the House of Delegates is in session, with the advice and consent of the House of Delegates; or if the House of Delegates is not in session, by the Governor alone. An appointment made under paragraph (2)(ii) of this subsection shall continue in force until the end of the next session of the General Assembly. The term of the substitute member is 3 years and begins on the first Monday in May. If a regular member of the Board becomes incapacitated from any cause or if a vacancy occurs on the Board for any reason, the substitute member, on request of the chair or the majority of the Board, shall serve on the Board until the incapacity ends or the vacancy is filled. While serving on the Board, the substitute member has all the powers and duties of a regular member.