Mont. Code Ann. § 28-2-1602

How written contract may be altered by parties

A contract in writing may be altered by a contract in writing or by an executed oral agreement, and not otherwise.

History:
En. Sec. 2281, Civ. C. 1895
Re-en. Sec. 5067, Rev. C. 1907
Re-en. Sec. 7569, R.C.M. 1921
Cal. Civ. C. Sec. 1698
Re-en. Sec. 7569, R.C.M. 1935
R.C.M. 1947, 13-907.