The custodian shall transfer in an appropriate manner the custodial property to the minor or to the minor's estate upon the earlier of:
The minor's attainment of twenty-one (21) years of age with respect to custodial property transferred under Section 91-20-9 or 91-20-11;
The minor's attainment of eighteen (18) years of age with respect to custodial property transferred under Section 91-20-13 or 91-20-15; or
The minor's death.