A vacancy in the position of Board member shall occur upon resignation, death, conviction of a felony, or removal from office of a Director. The Governor may remove any public member from office on a formal finding of incompetence, neglect of duty or malfeasance in office. Within 30 days after the office of any appointed member becomes vacant for any reason, the Governor shall fill the vacancy for the unexpired term in the same manner as that in which appointments are made. If the Senate is not in session when the first appointments are made or when the Governor fills a vacancy, the Governor shall make temporary appointments until the next meeting of the Senate, when he shall nominate persons to be confirmed by the Senate.
20 ILCS 3990/4