70 ILCS 705/16.01
Every fire protection district having a fire department of which any officers or members are full time, paid members shall be subject to Sections 16.01 to 16.18, inclusive. In every such fire protection district the board of trustees may appoint a board of fire commissioners. This board shall consist of 3 members, whose terms of office shall be 3 years and until their respective successors are appointed and have qualified, except as provided in Section 16.02. No member of a board of trustees of any fire protection district shall be appointed to any board of fire commissioners. The Board of Trustees of any fire protection district having a fire department of which 12 or more are full time, paid members shall appoint a separate board of fire commissioners pursuant to Section 16.02 for the purpose of administering the provisions of Sections 16.01 to 16.18, inclusive. The board of trustees of any fire protection district which is subject to Sections 16.01 to 16.18, inclusive, but which does not have a board of fire commissioners, shall perform the duties and have the powers of boards of fire commissioners as set forth in those Sections.
The provisions of Sections 16.01 through 16.18, inclusive, shall apply only to full time, paid members of a fire protection district fire department.
Unless inconsistent with this Act, the provisions of Division 2.1 of Article 10 of the Illinois Municipal Code shall apply, to the extent that they may be made applicable, to fire protection districts subject to Sections 16.01 to 16.18, inclusive.
70 ILCS 705/16.01