105 ILCS 5/10-22.34b
To utilize nonlicensed persons, under the direction of a licensed teacher, for providing specialized instruction related to a course assigned to the licensed teacher on a regular basis, not otherwise readily available in the immediate school environment, in the fields for which they are particularly qualified by reason of their specialized knowledge or skills. The duration of the instruction shall be determined by the licensed teacher under whose direction the program is conducted in view of the educational need to be satisfied.
Before a nonlicensed person may be utilized for such specialized instruction, the school board must secure the written approval of the regional superintendent of schools as to the qualifications of the particular nonlicensed person, the particular instruction he or she is to provide, the specific functions to be served, the total number of hours he or she is to provide such instruction and any compensation to be paid that person. The State Board of Education shall prescribe, by rule, criteria for determining qualifications of such persons and the nature of specialized instruction for which, and the extent to which, such persons may be used.
Nothing in this Section shall prevent the utilization of a person with specialized knowledge or experiences as a guest lecturer or resource person in the classroom under the direct supervision of a licensed teacher assigned to the classroom on a regular basis, with prior approval of the school administration.
105 ILCS 5/10-22.34b