Conditions imposing restraints upon marriage, except upon the marriage of a minor, are void, but this does not affect limitations where the intent was not to forbid marriage but only to give the use until marriage.
Mont. Code Ann. § 70-1-404
Conditions restraining marriage void
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.