The provisions of Kan. Stat. Ann. §§ 12-5001 through 12-5006, and amendments thereto, shall be administered by the board of trustees of the Kansas public employees retirement system. The provisions of Kan. Stat. Ann. § 74-49,123, and amendments thereto, shall apply to the administration of the provisions of Kan. Stat. Ann. §§ 12-5001 through 12-5006, and amendments thereto.