; (2) the funds contained in such account shall be used solely to carry out the oral history program under section 2; and (3) the Librarian may not deposit into such account any funds donated to the Librarian which are not donated for the exclusive purpose. 4. Authorization of appropriations (a) Authorization There are authorized to be appropriated to carry out this Act— (1) $7,600,000 for fiscal year 2020; and (2) such sums as may be necessary for each of the fiscal years 2021 through 2024. (b) Continuing availability of funds Any amount appropriated pursuant to the authorization under this section shall remain available until expended.