Mont. Code Ann. § 72-7-405
Power to contract -- presently exercisable power of appointment
72-7-405 . Power to contract -- presently exercisable power of appointment. A powerholder of a presently exercisable power of appointment may contract:
(1) not to exercise the power; or
(2) to exercise the power if the contract when made does not confer a benefit on an impermissible appointee.