On default of a premium payment due on a policy anniversary, any cash surrender value available under the policy, regardless of whether the cash surrender value is required under § 16-303 of this subtitle, shall be at least: the present value of the future guaranteed benefits, calculated as of that policy anniversary, that would have been provided under the policy, including any existing paid-up additions; less the sum of: the present value of adjusted premiums, calculated as of that policy anniversary in accordance with the applicable provisions of §§ 16-307 through 16-309 of this subtitle, corresponding to premiums that would have fallen due on or after the anniversary; and the amount of any indebtedness to the insurer on the policy. This subsection applies only to a policy that: by rider or supplemental policy provision, provides supplemental life insurance or annuity benefits at the option of the insured for an identifiable additional premium; and is issued on or after the operative date of § 16-309 of this subtitle. On a policy subject to this subsection, the cash surrender value referred to in subsection (a) of this section shall be at least the sum of: the cash surrender value for an otherwise similar policy issued at the same age without the rider or supplemental policy provision; and the cash surrender value calculated under subsection (a) of this section for a policy that provides only the benefits otherwise provided by the rider or supplemental policy provision. This subsection applies only to a family policy that: defines a primary insured and provides term insurance on the life of the spouse of the primary insured that expires before the spouse’s age 71; and is issued on or after the operative date of § 16-309 of this subtitle. On a policy subject to this subsection, the cash surrender value referred to in subsection (a) of this section shall be at least the sum of: the cash surrender value calculated under subsection (a) of this section for an otherwise similar policy issued at the same age without term insurance on the life of the spouse; and the cash surrender value calculated under subsection (a) of this section for a policy that provides only the benefits otherwise provided by term insurance on the life of the spouse. This subsection applies to a policy of life insurance that is paid-up by completion of all premium payments or is continued under any paid-up nonforfeiture benefit, regardless of whether the cash surrender value is required under § 16-303 of this subtitle. On a policy subject to this subsection, the cash surrender value available within 30 days after a policy anniversary shall be at least the present value, calculated as of the policy anniversary, of the future guaranteed benefits, including any existing paid-up additions, reduced by any indebtedness to the insurer on the policy.