Mont. Code Ann. § 32-1-463

32-1-463 . Sale of securities by officer to bank. (1) A director, officer, employee, or controlling stockholder of any bank may not, directly or indirectly, for the person's account, for the person, or as the partner or agent of others sell or transfer or cause to be sold or transferred to the bank of which the person is a director, officer, employee, or controlling stockholder any note or bond secured by any mortgage or trust deed on real estate or any contract arising from the sale of real estate, in which the director, officer, employee, or controlling stockholder is personally or financially interested, without a vote of the majority of the board of the bank, duly noted upon the minutes of the meeting at which the transaction is decided upon. The minutes must be signed by a majority of the board.

(2) Any director, officer, employee, or controlling stockholder of any bank who knowingly violates or consents to the violation of this provision is guilty of a felony.