(a) Notwithstanding any other provisions of law, no circuit judge of the Sixteenth Judicial Circuit shall receive any increase in the local county salary supplement that the judge is receiving on May 21, 1992 unless the increase is provided hereafter by local law.
(b) The county salary supplements provided for in subsection (a) shall be paid from the general fund of the county within the circuit in equal monthly installments and shall be in lieu of all county salary supplements and expense allowances, excluding travel mileage reimbursements, heretofore provided by law for the judges in the circuit.