Section, [Pub. L. 88–204, title III, § 306], as added [Pub. L. 90–575, title IV, § 403], Oct. 16, 1968, [82 Stat. 1060], related to annual interest grants, providing in: subsec. (a) for power of Commissioner; subsec. (b) for maximum period and amount and approval by Secretary; subsec. (c) for authorization of appropriations and limitation on aggregate amount of contracts; subsec. (d) for maximum amount of funds usable in one State; and subsec. (e) certain prerequisites and nature of financing.