Mont. Code Ann. § 37-61-403
The attorney in an action or special proceeding may be changed at any time before or after judgment or final determination, as follows:
History: En. Sec. 399, C. Civ. Proc. 1895; re-en. Sec. 6390, Rev. C. 1907; re-en. Sec. 8975, R.C.M. 1921; Cal. C. Civ. Proc. Sec. 284; re-en. Sec. 8975, R.C.M. 1935; R.C.M. 1947, 93-2102.