Pub. L. 90-351, tit. I, pt. E, sec. 516

Sec. 516. (a) Payments under this title may be made in installments, and in advance or by way of reimbursement, as may be determined by the Administration. (b) Not more than 12 per centum of the sums appropriated for any fiscal year to carry out the provisions of this title may be used within any one State except that this limitation shall not apply to grants made pursuant to part D.