The Governor, by and with the advice and consent of the Senate, shall appoint the members of the Board and fill any and all vacancies. If the Senate is in recess when such appointment is made, the Governor shall make a temporary appointment until the next meeting of the Senate. Of the members initially appointed by the Governor, one shall serve for an initial term expiring July 1, 1973, one for an initial term expiring July 1, 1974 and one for an initial term expiring July 1, 1975. At the expiration of the term of any member, his successor shall be appointed by the Governor in like manner and with like regard to place of residence of the appointee.
70 ILCS 1870/22