66
STAT.]
389
PUBLIC LAW 4 5 3 - J U L Y 5, 1952
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. N A T I O N A L ZOOLOGICAL P A R 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; $615,000: Provided, That funds appropriated under this head shall be expended by expenditure warrant as an advance to the National Zoological P a r k 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. 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 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 thfe affidavit has not contrary to the provisions of this section engaged in a strike against the Government of the United States or the government of the District of Columbia, is not 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 that such person does not advocate, and is not a member of an organization that advocates, the overthrow of the Government of the United States by force or violence: Provided further, That 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 who is a member of an organization that advocates, the overthrow of the Government of the United States by force or violence, and accepts employment the salary or wages for which are paid from any appropriation contained in this Act shall be guilty of a felony and, upon conviction, shall be fined not more than $1,000 or imprisoned for not
Vouchers.
Strikes or overthrow of Government.
Affidavit.
Penalty.
�
