(a) The executive commissioner shall adopt rules governing the determination of the amount of financial assistance to be granted for the support of a dependent child. The amount granted, when combined with the income and other resources available for the child’s support, must be sufficient to provide the child with a subsistence compatible with decency and health.
(b) In considering the amount of income or other resources available to a child or a relative claiming financial assistance on the child’s behalf, the commission shall also consider reasonable expenses attributable to earning the income. The commission may permit all or part of the earned or other income to be set aside for the future identifiable needs of the child, subject to limitations prescribed by the executive commissioner.

(c) The commission’s agents employed in the region or county in which the dependent child resides shall determine the amount to be paid in accordance with the rules promulgated by the executive commissioner.