If an annuity or pure endowment contract, other than a reversionary, survivorship, or group annuity, is participating, there shall be a provision that the insurer shall annually ascertain and apportion any divisible surplus accruing on the contract.
Mont. Code Ann. § 33-20-306, under Annuity Contract Provisions.
Mont. Code Ann. § 33-20-306
If an annuity or pure endowment contract, other than a reversionary, survivorship, or group annuity, is participating, there shall be a provision that the insurer shall annually ascertain and apportion any divisible surplus accruing on the contract.