There are authorized to be appropriated to the insurance fund, as repayable advances, such sums as may be necessary to meet obligations incurred under subsection (g) of this section. All such sums shall remain available without fiscal year limitation. Advances made pursuant to this subsection shall be repaid, with interest, to the general fund of the Treasury when the Secretary determines that moneys are available in the insurance fund for such repayments. Interest on such advances shall be computed in the same manner as provided in subsection (b)(2) of section
934a of this title.