Ill. Admin. Code tit. 4, § 1725.40
2) the best means and time for contacting the complainant.
c) If a grievance is based on any complaint of alleged discrimination, the following information must also be completed on the formal grievance intake form:
3) the nature of the alleged discrimination; and
d) If a grievance is based on the denial of a requested reasonable accommodation, the following information must also be completed on the formal grievance intake form, to the extent an answer is known:
6) the estimated cost of the accommodation (if known);
8) any alternative accommodations that may provide accessibility;