2010—Subsec. (a). Pub. L. 111–211 inserted “, tribal,” after “State” in introductory provisions.

1986—Pub. L. 99–570 and Pub. L. 99–646 amended section substantially identically designating existing provisions as subsec. (a) and adding subsec. (b), with the exception of the amendment of subsec. (a) for which Pub. L. 99–570 directed the insertion of “or (with respect to offenses under this subchapter or subchapter II of this chapter) any State or local law enforcement officer” and Pub. L. 99–646 directed the insertion of “or any State or local law enforcement officer”, the latter of which was executed to reflect the probable intent of Congress.

1979—Pub. L. 96–132 substituted “Drug Enforcement Administration” for “Bureau of Narcotics and Dangerous Drugs”.