40 ILCS 5/1-113.20: Investment strategies; explicit and implicit costs.

Every pension fund, retirement system, and investment board created under this Code, except those whose investments are restricted by Section 1-113.2 of this Code, shall instruct the fund's, system's, or board's investment advisors to utilize investment strategies designed to ensure that all securities transactions are executed in such a manner that the total explicit and implicit costs and total proceeds in every transaction are the most favorable under the circumstances.