There is hereby established in the Treasury a loan guarantee and loan fund (hereinafter in this section referred to as the “fund”) which shall be available to the Secretary without fiscal year limitation, in such amounts as may be specified from time to time in appropriations Acts, (i) to enable him to discharge his responsibilities under guarantees issued by him under this part, (ii) for payment of interest on the loans to nonprofit agencies which are guaranteed, (iii) for direct loans to public agencies which are sold and guaranteed, (iv) for payment of interest with respect to such loans, and (v) for repurchase by him of direct loans to public agencies which have been sold and guaranteed. There are authorized to be appropriated to the fund from time to time such amounts as may be necessary to provide capital required for the fund. To the extent authorized from time to time in appropriation Acts, there shall be deposited in the fund amounts received by the Secretary as interest payments or repayments of principal on loans and any other moneys, property, or assets derived by him from his operations under this part, including any moneys derived from the sale of assets.