Mont. Code Ann. § 61-5-303
Making false affidavit -- penalty
61-5-303 . Making false affidavit -- penalty. Any person who makes any false affidavit or knowingly swears or affirms falsely to any matter or thing required by the terms of parts 1 through 3 of this chapter to be sworn to or affirmed is guilty of false swearing and upon conviction shall be punishable as provided by 45-7-202 .