Mont. Code Ann. § 33-16-115
Acts done by authority of chapter not violation of other laws
33-16-115 . Acts done by authority of chapter not violation of other laws. No act done, action taken, or agreement made pursuant to the authority conferred by this chapter shall constitute a violation of or grounds for prosecution or civil proceedings under any other law of this state heretofore or hereafter enacted which does not specifically refer to insurance.