"Retirement system" means a retirement system that (i) is established under Article 2, 14, 16, or 18 of the Illinois Pension Code and (ii) processes retirement annuities through the Illinois Comptroller's Office.
"State agency" means any executive branch State agency, board, or commission that (i) has 50 or more employees and (ii) processes payrolls through the Illinois Comptroller's Office.
15 ILCS 405/9.03a