Mont. Code Ann. § 33-20-504

Notwithstanding the requirements of 33-20-503, any deferred annuity contract may provide that if no consideration has been received under a contract for a period of 2 full years and the portion of the paid-up annuity benefit at maturity on the plan stipulated in the contract arising from consideration paid prior to such period would be less than $20 monthly, the company may at its option terminate such contract by payment in cash of the then present value of such portion of the paid-up annuity benefit, calculated on the basis of the mortality table, if any, and interest rate specified in the contract for determining the paid-up annuity benefit, and by such payment shall be relieved of any further obligation under such contract.