62 STAT.] SOTH CONG., 2D SESS.-CH. 555 -JUNE 19, 1948 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 Park Police force, including $225 for deposit in the Treasury for penalty mail (39 U. S . C. 321d); 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 self-propelled machinery; the hire of draft animals with or with- out drivers at local rates approved by the Secretary of the Interior; the purchase and maintenance of draft animals, harness, and wagons; $1,500,000: Provided,That not to exceed $10,000 of the amount herein appropriated may be expended for the erection of minor auxiliary structures. NATIONAL CAPITAL PARK AND PLANNING COMMISSION For necessary expenses of the National Capital Park and Planning Commission except the acquisition of land (40 U. S. C. 71), including $80 for deposit in the Treasury for penalty mail (39 U. S. C . 321d); stenographic reporting service as authorized by section 15 of the Act of August 2, 1946 (5 U. S . C. 55a), and expenses of attendance at meetings of organizations concerned with city planning matters, $75,500. NATIONAL ZOOLOGICAL PARK 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; pur- chase, care, and transportation of specimens; purchase of motorcycles; revolvers and ammunition; purchase of uniforms and equipment for police, and uniforms for keepers and assistant keepers; $492,600. 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 Auditor 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 or authorized hereby to be expended shall be used to pay the compensa- tion of any officer or employee of the Government of the United States, or of the District of Columbia unless such person is a citizen of the United States, or a person in the service of the United States or the District of Columbia on the date of the approval of this Act who being eligible for citizenship had theretofore filed a declaration of intention to become a citizen or who owes allegiance to the United States. This section shall not apply to citizens of the Common- wealth of the Philippines or nationals of those countries allied with the United States in the prosecution of the war effort. SEC. 4 . 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 that advocates, the overthrow of the Government of the United States by force or violence: Provided,That for the purposes hereof an affidavit shall be considered prima facie evidence that the person making the 557 58 Stat. 394. Post, p . 1049. 43 Stat. 463. 68 Stat. 394. Post, p. 1049 . 60 Stat. 810 . Vouchers. Citizenship require- nent. Exception. Persons engaging, etc., in strikes against or advocating over- throw of U. S. Gov- ernment. Affidavit.
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