; 2 U.S.C. 150 ), shall remain available until expended: Provided, That the Library of Congress may not obligate or expend any funds derived from collections under the Act of June 28, 1902, in excess of the amount authorized for obligation or expenditure in appropriations Acts: Provided further, That of the total amount appropriated, not more than $18,000 may be expended, on the certification of the Librarian of Congress, in connection with official representation and reception expenses, including for the Overseas Field Offices: Provided further, That of the total amount appropriated, no less than $10,360,000 shall remain available until expended for the Teaching with Primary Sources program, of which $2,379,000 shall be for the Lewis-Houghton Civics and Democracy Initiative: Provided further, That of the total amount appropriated, $1,509,000 shall remain available until expended for upgrade of the Legislative Branch Financial Management System: Provided further, That of the total amount appropriated, no less than $150,000 shall remain available until expended for the Surplus Books Program to promote the program and facilitate a greater number of donations to eligible entities across the United States: Provided further, That of the total amount appropriated, $4,205,000 shall remain available until expended for the Veterans History Project to continue digitization efforts of already collected materials, reach a greater number of veterans to record their stories, and promote public access to the Project: Provided further, That of the total amount appropriated, $1,500,000 shall remain available until expended for the COVID–19 American History Project: Provided further, That of such amount, $5,000,000 shall be available until expended for the development and implementation of a pilot data storage and migration method initiative. Copyright Office SALARIES AND EXPENSES For all necessary expenses of the Copyright Office, $103,128,000, of which not more than $38,025,000, to remain available until expended, shall be