(a) The state shall pay to the duly appointed or qualified guardian or other legal representative of an eligible surviving minor child:
(1) $400 each month, if there is one surviving child;
(2) $600 each month, if there are two surviving children; or
(3) $800 each month, if there are three or more surviving children.
(b) A child's entitlement to assistance payable under this section ends on the last day of the month that includes the child's 18th birthday. At that time, payments to any other surviving minor children shall be adjusted, as necessary, to conform to the amounts payable under Subsection (a).
(c) A payment under this section is in addition to any payment made under Section 615.022.