70 ILCS 2005/6
Within 60 days after the organization of an emergency services district under the provisions of this Act, a board of trustees, consisting of 5 members, for the government and control of the affairs and business of the emergency services district shall be appointed in the following manner:
Upon the expiration of the term of a trustee who is in office at the time of the publication of each decennial federal census of population, the successor shall be a resident of whichever county is entitled to the representation in order to bring about the proportional representation required by this Act, and the successor shall be appointed by the appointing authority of that county. Thereafter, each trustee shall be succeeded by a resident of the same county, who shall be appointed by the same appointing authority. Of the trustees first appointed, 3 shall hold office until the second Monday in December after the next succeeding general election for members of the General Assembly and 2 shall hold office until the second Monday in December 2 years after the next succeeding general election for members of the General Assembly, and until their successors are appointed and qualified. Thereafter, the trustees of the district shall be appointed in every year in which the term of any of the trustees expires and shall hold office for 4 years and until their successors are appointed and qualified. Each trustee shall be a legal voter in the district. Each trustee shall be compensated at the same rate, which shall not exceed $750 per fiscal year, as determined by the board of trustees.
Whenever a vacancy occurs in the board of trustees the appropriate appointing authority shall appoint some person to fill the remainder of the unexpired term.
70 ILCS 2005/6