Mont. Code Ann. § 30-2-202

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 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:

(1) by course of dealing or usage of trade (30-1-205) or by course of performance (30-2-208); and

(2) 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.

History:
En. Sec. 2-202, Ch. 264, L. 1963
R.C.M. 1947, 87A-2-202
Amd. Sec. 9, Ch. 200, L. 2025 (SB 426 - Ricci, Vince (R) SD 27)