810 ILCS 5/2A-202

    (810 ILCS 5/2A-202) (from Ch. 26, par. 2A-202)
    (Text of Section before amendment by P.A. 103-1036)
    Sec. 2A-202.

Final written expression; parol or
extrinsic evidence.
Terms 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 dealing or usage of trade or by

course of performance; 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.

(Source: P.A. 87-493.)

(Text of Section after amendment by P.A. 103-1036)
Sec. 2A-202. Final expression; parol or extrinsic evidence.

Terms with respect to which the confirmatory memoranda of the parties agree or which are otherwise set forth in a record 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 dealing or usage of trade or by

course of performance; and

(b) by evidence of consistent additional terms unless

the court finds the record to have been intended also as a complete and exclusive statement of the terms of the agreement.

(Source: P.A. 103-1036, eff. 1-1-25.)