§ 31.22 COMPENSATION.
   The President shall receive the compensation that is established by the Board of Trustees in the annual appropriation or budget ordinance or by special ordinance. An increase or decrease in the salary of the President shall not take effect during the term for which that President is elected. His or her salary shall be fixed 180 days before the beginning of the term for which compensation is to be fixed.
(65 ILCS 5/3.1-50-10)