When an agent exceeds the agent's authority, the agent's principal is bound by the agent's authorized acts only so far as the authorized acts can be plainly separated from those that are unauthorized.
Mont. Code Ann. § 28-10-605
Extent to which principal bound when agent exceeds authority
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.