A condition in a contract the fulfillment of which is impossible or unlawful within the meaning of part 6 and this part or which is repugnant to the nature of the interest created by the contract is void.
Mont. Code Ann. § 28-2-707
What conditions 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.