Except as provided in subsection (b) of this section, the Secretary shall distribute a per capita share payable to a living enrollee directly to such enrollee, and the Secretary shall distribute a per capita share payable to a deceased enrollee directly to his heirs or legatees upon proof of death and inheritance satisfactory to the Secretary, whose findings upon such proof shall be final and conclusive.
A share payable to a person under twenty-one years of age or to a person under legal disability shall be paid in accordance with such procedures as the Secretary determines will adequately protect the best interests of such persons.