Mont. Code Ann. § 71-1-108
Title acquired by the mortgagor subsequent to the execution of the mortgage inures to the mortgagee as security for the debt in like manner as if acquired before the execution.
History: En. Sec. 3819, Civ. C. 1895; re-en. Sec. 5740, Rev. C. 1907; re-en. Sec. 8255, R.C.M. 1921; Cal. Civ. C. Sec. 2930; re-en. Sec. 8255, R.C.M. 1935; R.C.M. 1947, 52-110.