67
STAT.]
293
PUBLIC LAW 1 7 3 - J U L Y 31, 1953
in connection with national, patriotic, civic, and recreational functions held in the parks, including the President's Cup Kegatta, and expenses incident to the conducting of band concerts in the parks; such expenses to include pay and allowances of the United States P a r k Police force; per diem employees at rates of pay approved by the Secretary of the Interior, not exceeding current rates of pay for similar employment in the District of Columbia; uniforming and equipping the United States P a r k Police force; the purchase, issue, operation, maintenance, repair, exchange, and storage of revolvers^ uniforms, ammunition, and radio equipment and the rental of teletype service; and the purchase of passenger motor vehicles, bicycles, motorcycles, and selfpropelled machinery; the hire of draft animals with or without drivers at local rates approved by the Secretary of the Interior; the purchase and maintenace of draft animals, harness, and wagons; $2,078,500, of which $25,000 shall be payable from the highway fund: Provided, That not to exceed $15,000 of the amount herein appropriated may be expended for the erection of minor auxiliary structures: Provided further, That funds appropriated under or transferred to this head for services rendered by the National P a r k Service shall be expended by expenditure warrant as an advance to said service and shall be credited as a repayment and maintained in a special account. The amounts so advanced will be available for the objects specified herein or in the appropriation from which such funds are transferred, any unexpended balance to be returned to the appropriation concerned not later than two full fiscal years after the close of the current fiscal year. N A T I O N A L ZOOLOGICAL P A K K For expenses necessary for the National Zoological Park, including erecting and repairing buildings; care and improvement of grounds; travel, including travel for the procurement of live specimens; purchase, care, and transportation of specimens; purchase of motorcycles and passenger motor vehicles; revolvers and ammunition; purchase of uniforms and equipment for police, and uniforms for keepers and assistant keepers; $625,000: Provided, That funds appropriated under this head shall be expended by expenditure warrant as an advance to the National Zoological Park and shall be credited as a repayment and maintained in a special account. The amounts so advanced will be available for the objects herein specified, any unexpended balance to be returned to this appropriation not later than two full fiscal years after the close of the current fiscal year. Capital outlay. National Zoological P a r k: For the installation of a steam line from the central heating plant to the birdhouse, $35,000. GENERAL PROVISIONS SEC. 2. Except as otherwise provided herein, all vouchers covering expenditures of appropriations contained in this Act shall be audited before payment by or under the jurisdiction only of the accounting officer for the District of Columbia and the vouchers as approved shall be paid by checks issued by the Disbursing Officer without countersignature. SEC. 3. No part of any appropriation contained in this Act shall be used to pay the salary or wages of any person who engages in a strike against the Government of the United States or the government of the District of Columbia, or who is a member of an organization of Government employees that asserts the right to strike against the Government of the United States or the government of the District of Columbia, or who advocates, or is a member of an organization
Vouchers.
Strikes or ovei* throw of Government.
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