Section 810 ILCS 5/2-202 - [Effective Until 1/1/2025] Final written expression: parol or extrinsic evidenceTerms with respect to which the confirmatory memoranda of the parties agree or which are otherwise set forth in a writing intended by the parties as a final expression of their agreement with respect to such terms as are included therein may not be contradicted by evidence of any prior agreement or of a contemporaneous oral agreement but may be explained or supplemented
(a) by course of performance, course of dealing , or usage of trade (Section 1-303); and (b) by evidence of consistent additional terms unless the court finds the writing to have been intended also as a complete and exclusive statement of the terms of the agreement. Amended by P.A. 095-0895,§ 15, eff. 1/1/2009.This section is set out more than once due to postponed, multiple, or conflicting amendments.