The telephone bank’s capital shall consist of capital subscribed by the United States, by borrowers from the telephone bank, by corporations and public bodies eligible to become borrowers from the telephone bank, and by organizations controlled by such borrowers, corporations, and public bodies. Beginning with the fiscal year 1971 and for each fiscal year thereafter but not later than fiscal year 1991, the United States shall furnish capital for the purchase of class A stock and there are hereby authorized to be appropriated such amounts, not to exceed $30,000,000 annually, for such purchase until such class A stock shall equal $600,000,000: Provided, That on or before July 1, 1975, the Secretary shall make a report to the President for transmittal to the Congress on the status of capitalization of the telephone bank by the United States with appropriate recommendations. As used in this section and section
931 of this title, the term “net collection proceeds” shall be deemed to mean payments from and after July 1, 1969, of principal and interest on loans heretofore or hereafter made under section
922 of this title, less an amount representing interest payable to the Secretary of the Treasury on loans to the Secretary for telephone purposes.