84 STAT. ]
PUBLIC LAW 91.513-OCT. 27, 1970
(b) I n the case of any individual who has been or may be called to testify or provide other information at any proceeding before a court or grand jury of the United States, the United States district court for the judicial district in which the proceeding is or may be held shall issue, upon the request of the United States attorney for such district, an order requiring such individual to give any testimony or provide any other information which he refuses to give or provide on the basis of his privilege against self-incrimination. (c) A United States attorney may, with the approval of the Attorney General or the Deputy Attorney General, or any Assistant Attorney General designated by the Attorney General, request an order under subsection (b) when in his judgment— (1) the testimony or other information from such individual may be necessary to the public interest; and (2) such individual has refused or is likely to refuse to testify or provide other information on the basis of his privilege against self-incrimination.
1279
order,
BURDEN o r PROOF; LIABILITIES
SEC. 515. (a)(1) I t shall not be necessary for the United States to negative any exemption or exception set forth in this title in any complaint, information, indictment, or other pleading or in any trial, hearing, or other proceeding under this title, and the burden of going forward with the evidence with respect to any such exemption or exception shall be upon the person claiming its benefit. (2) I n the case of a person charged under section 404(a) with the possession of a controlled substance, any label identifying such substance for purposes of section 503(b)(2) of the Federal Food, Drug, and Cosmetic Act shall be admissible in evidence and shall be prima facie evidence that such substance was obtained pursuant to a valid prescription from a practitioner while acting in the course of his professional practice. (b) I n the absence of proof that a person is the duly authorized holder of an appropriate registration or order form issued under this title, he shall be presumed not to be the holder of such registration or form, and the burden of going forward with the evidence with respect to such registration or form shall be upon him. (c) The burden of going forward with the evidence to establish that a vehicle, vessel, or aircraft used in connection with controlled substances in schedule I was used in accordance with the provisions of this title shall be on the persons engaged in such use. (d) Except as provided in sections 2234 and 2235 of title 18, United States Code, no civil or criminal liability shall be imposed by virtue of this title upon any duly authorized Federal officer lawfully engaged in the enforcement of this title, or upon any duly authorized officer of any State, territory, political subdivision thereof, the District of Columbia, or any possession of the United States, who shall be lawfully engaged in the enforcement of any law or municipal ordinance relating to controlled substances.
^"'e, p. i264. ^s Stat. 648. ^^ "^^ ^^^•
hitufo""^^'^'"" 62 s°tLt. soa.
PAYMENTS AND ADVANCES
SEC. 516. (a) The Attorney General is authorized to pay any per- informers, payson, from funds appropriated for the Bureau of Narcotics and Dan- ment. ""'"' gerous Drugs, for information concerning a violation of this title, such sum or sums of money as he may deem appropriate, without reference to any moieties or rewards to which such person may otherwise be entitled by law.
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