(a) The Board of Corrections and the Director of the Department of Correction shall decide what improvements are necessary, which are not otherwise provided by law. These improvements shall be made under the direction and supervision of the director.
(b) In making any necessary improvements under the provisions of this section, if in his or her discretion it shall be deemed necessary, the director may employ the services of an engineer, draftsman, or architect to make such plans and specifications as may be necessary.