Notwithstanding any provision of law to the contrary, whenever the Kansas public employees retirement system board of trustees is directed to invest and reinvest and manage any moneys or funds pursuant to law, other than as provided pursuant to Kan. Stat. Ann. § 74-4921, and amendments thereto, or any other provision related to the Kansas public employees retirement system and systems thereunder, the board may charge a fee to cover the board’s expenses, related to such investment and management services. The provisions of this section shall be part of and supplemental to the provisions of Kan. Stat. Ann. § 74-4901 et seq., and amendments thereto. The provisions of this section shall be effective on and after July 1, 2000.