A grant made by an owner of an estate for life or years, purporting to transfer a greater estate than the owner could lawfully transfer, does not work a forfeiture of the owner's estate but passes to the grantee all the estate that the grantor could lawfully transfer.
Mont. Code Ann. § 70-20-313
Grant by owner for life or years
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.