54 STAT.] 76TH CONG. , 3D SESS.-CH. 333 -JUNE 12, 1940 able: Provided, That the certificate of the Commissioners shall be sufficient voucher for the expenditure of this appropriation for such purposes as they may deem necessary. REFUND OF ERRONEOUS COLLECTIONS To enable the Commissioners, in any case where taxes, special assessments, school-tuition charges, payments for lost library books, tents, fines, fees, or collections of any character have been erroneously covered into the Treasury to the credit of the general revenues of the District of Columbia, to refund such erroneous payments, wholly or in part, including the refunding of fees paid for building permits authorized by the District of Columbia Appropriation Act approved March 2, 1911 (36 Stat. 967), $68,000: Provided, That this appro- priation shall be available for such refunds of payments made within the past three years. REPAYMENT OF LOAN FROM PUBLIC WORKS ADMINISTRATION For reimbursement to the United States, in compliance with sec- tion 3 of the Act approved June 25, 1938 (52 Stat. 1203), of funds loaned under the authority of said Act, including interest, $800,000. FREE PUBLIC LIBRARY For personal services and for substitutes and other special and temporary services, including extra services on Sundays, holidays, and Saturday half holidays, at the discretion of the librarian, $435,380. Miscellaneous: For books, periodicals, newspapers, and other printed material, including payment in advance for subscription books, and society publications, including not exceeding $300 for music records and sound recordings, $72,500, of which $25,000 shall be immediately available for the stocking of the new Southwest Branch Library: Provided, That the disbursing officer of the District of Columbia is authorized to advance to the librarian of the Free Public Library, upon requisition previously approved by the aud- itor of the District of Columbia, sums of money not exceeding $25 at the first of each month, to be expended for the purchase of certain books, pamphlets, numbers of periodicals or newspapers or other printed material, and to be accounted for on itemized vouchers. For binding, including necessary personal services, $17,500. For maintenance, alterations, repairs, fuel, lighting, fitting up buildings, care of grounds, maintenance of motor delivery vehicles, and other contingent expenses, $48,000, of which $11,000 shall be immediately available for furniture and equipment for the new Southwest Branch. For rent of suitable quarters for branch libraries in Chevy Chase and Woodridge, $5,760. For continuing the construction in square 491 of the first unit of an extensible library building, including quarters for the adminis- trative offices of the Board of Education, $200,000: Provided, That the unexpended balances of the amounts made available by the Dis- trict of Columbia Appropriation Act, 1940, for the preparation of plans and specifications for this building shall remain available for the same purposes and under the same conditions and limitations until June 30, 1941. 313 Proviso. Voucher for expend. iture. Payments author- ized. Post, p. 636. Building permits. 20 D. C. ode §923. Proviso. Availability. Reimbursement. 52 Stat. 1204 . Personal services. Miscellaneous. Southwest Branch Library. Proviso. Advances for pur- chase of books, etc. Accounting. Binding. Contingent ex- penses. Chevy Chase and Woodridge branches, rent. Library buldng, construction. Proviso. Reappropriation. 63 Stat. 1011 .