The consideration of a contract must be lawful within the meaning of 28-2-701. If any part of a single consideration for one or more objects or of several considerations for a single object is unlawful, the entire contract is void.
Mont. Code Ann. § 28-2-803
Consideration to be lawful -- effect of illegality
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.