Mont. Code Ann. § 3-15-303
A person is not competent to act as juror:
History: En. Sec. 231, C. Civ. Proc. 1895; re-en. Sec. 6338, Rev. C. 1907; re-en. Sec. 8892, R.C.M. 1921; Cal. C. Civ. Proc. Sec. 199; re-en. Sec. 8892, R.C.M. 1935; R.C.M. 1947, 93-1303.