820 ILCS 405/702
The claims adjudicator shall for each week with respect to which the claimant claims benefits or waiting period credit, make a "determination" which shall state whether or not the claimant is eligible for such benefits or waiting period credit and the sum to be paid the claimant with respect to such week. The claims adjudicator shall promptly notify the claimant and such employing unit as shall, within the time and in the manner prescribed by the Director, have filed a sufficient allegation that the claimant is ineligible to receive benefits or waiting period credit for said week, of his "determination" and the reasons therefor. The Director may, by rule adopted with the advice and aid of the Employment Security Advisory Board, require that an employing unit with 25 or more individuals in its employ during a calendar year, or an entity representing 5 or more employing units during a calendar year, file an allegation of ineligibility electronically in a manner prescribed by the Director for the one year period commencing on July 1 of the immediately succeeding calendar year and ending on June 30 of the second succeeding calendar year. In making his "determination," the claims adjudicator shall give consideration to the information, if any, contained in the employing unit's allegation, whether or not the allegation is sufficient. The claims adjudicator shall deem an employing unit's allegation sufficient only if it contains a reason or reasons therefor (other than general conclusions of law, and statements such as "not actively seeking work" or "not available for work" shall be deemed, for this purpose, to be conclusions of law). If the claims adjudicator deems an allegation insufficient, he shall make a decision accordingly, and shall notify the employing unit of such decision and the reasons therefor. Such decision may be appealed by the employing unit to a Referee within the time limits prescribed by Section 800 for appeal from a "determination". Any such appeal, and any appeal from the Referee's decision thereon, shall be governed by the applicable provisions of Sections 801, 803, 804 and 805.
820 ILCS 405/702