(b) The director of the Purchasing Division shall, at the time of appointment:
(1) Be a graduate of an accredited college or university; and
(2) Have spent a minimum of ten of the fifteen years immediately preceding his or her appointment employed in an executive capacity in purchasing for any unit of government or for any business, commercial or industrial enterprise.
(c) The provisions of this article apply to all of the spending units of state government, except as otherwise provided by this article or by law.
(d) The provisions of this article do not apply to the judicial branch, the legislative branch, to purchases of stock made by the Alcohol Beverage Control Commissioner, and to purchases of textbooks for the State Board of Education.