Sec. 6.13. GUARDIANSHIP. Any benefit payable under this article to a dependent child as defined by Section 1.02(7)(B) of this Act may be paid only to a guardian who is appointed in accordance with Title 3, Estates Code. Any benefit payable under this article to a dependent child as defined by Section 1.02(7)(A) of this Act may, at the board's discretion, be:

(1) paid to a guardian appointed in accordance with Title 3, Estates Code; or

(2) accrued by the fund and paid directly to the dependent child on the child's 18th birthday.