Mont. Code Ann. § 26-3-103
The parties are deemed to be the same when those between whom the evidence is offered were on opposite sides in the former case and a judgment or other determination could in that case have been made between them alone, though other parties were joined with both or either.
History: En. Sec. 3198, C. Civ. Proc. 1895; re-en. Sec. 7916, Rev. C. 1907; re-en. Sec. 10560, R.C.M. 1921; Cal. C. Civ. Proc. Sec. 1910; re-en. Sec. 10560, R.C.M. 1935; R.C.M. 1947, 93-1001-22.