Mont. Code Ann. § 72-7-406
Power to contract -- power of appointment not presently exercisable
72-7-406 . Power to contract -- power of appointment not presently exercisable. A powerholder of a power of appointment that is not presently exercisable may contract to exercise or not to exercise the power only if the powerholder:
(1) is also the donor of the power; and
(2) has reserved the power in a revocable trust.