Sec. 12.02. DISTRIBUTION RULES FOR DISABILITY ANNUITY PAYMENTS. (a) If a member selects an optional annuity providing for payment of a fixed number of monthly annuity payments to the member's beneficiary or estate if the member dies before the total number of payments has been completed, the option is limited as provided by Subsections (b) and (c) of this section.

(b) If, according to mortality tables adopted by the Internal Revenue Service, at the time of the member's retirement the joint life expectancy of the member making the selection and of the beneficiary is less than the minimum period that monthly payments would be required under the option selected, the member must select another option so that the minimum period that monthly payments would be required does not exceed the joint life expectancy of the person making the selection and of the beneficiary.

(c) If the member making the selection designates the member's estate as beneficiary and if, according to mortality tables adopted by the Internal Revenue Service, the life expectancy of that member is less than the minimum period that monthly payments would be required under the option selected, the member must select another option so that the minimum period that monthly payments would be required does not exceed the member's life expectancy at the time of the member's retirement.

(d) If a member selects an optional annuity that is payable after the retiree's death throughout the life of a beneficiary who is not the retiree's spouse, payments to the beneficiary after the retiree's death may not exceed the applicable percentage of the annuity payment that would have been payable to the retiree using the following table:

(e) Unless the member's spouse is the beneficiary of an optional annuity that guarantees a fixed number of monthly payments, the guaranteed number of payments may not exceed the applicable period using the following table: