105 ILCS 5/3-13
Each county superintendent of schools shall appoint a county truant officer. Such appointee shall receive such compensation as may be fixed by the county board, together with his necessary traveling expenses, to be paid out of the county treasury. He shall file his acceptance with the county clerk and shall take and subscribe an oath of office. He shall perform the duties of truant officer in all the school districts of the county; provided, that the school board in any school district may appoint one or more truant officers and fix his or their compensation, which shall be paid by the district.
The county superintendent of schools shall furnish the county truant officer, at the opening of the schools, with a list of the teachers and superintendents employed in his county other than in school districts that employ truant officers.
105 ILCS 5/3-13