Mont. Code Ann. § 1-6-105
(1) Whenever, under any law of this state or under any rule, order, or requirement made under the law of this state, any matter is required or permitted to be supported, evidenced, established, or proved by a person's sworn written declaration, verification, certificate, oath, or affidavit, the matter may with like force and effect be supported, evidenced, established, or proved by an unsworn written declaration, certificate, verification, or statement that is subscribed by the person as true under penalty of perjury in substantially the following form:
(a) If executed within the state:
"I declare under penalty of perjury that the foregoing is true and correct.
........................................
Date and placeSignature"
(b) If executed in any place outside the state:
"I declare under penalty of perjury and under the laws of the state of Montana that the foregoing is true and correct.
..........................................
Date and placeSignature"
History: En. Sec. 2, Ch. 238, L. 2011.