Illinois Statutes Chapter 40. Pensions § 5/1-109. Duties of fiduciaries

(a) for the exclusive purpose of:

(b) with the care, skill, prudence and diligence under the circumstances then prevailing that a prudent person acting in a like capacity and familiar with such matters would use in the conduct of an enterprise of a like character with like aims;

(c) by diversifying the investments of the retirement system or pension fund so as to minimize the risk of large losses, unless under the circumstances it is clearly prudent not to do so; and

(d) in accordance with the provisions of the Article of this Code governing the retirement system or pension fund.