The Federal Rules of Criminal Procedure, referred to in subsec. (a), are set out in the Appendix to this title.

Section 3563(a)(4), referred to in subsec. (b)(3), probably means the par. (4) of section 3563(a) added by section 20414(b)(3) of Pub. L. 103–322, which was renumbered par. (5) by Pub. L. 104–132, title II, § 203(1)(C), Apr. 24, 1996, 110 Stat. 1227.

For a prior section 3565, applicable to offenses committed prior to Nov. 1, 1987, see note set out preceding section 3551 of this title.

2002—Subsec. (b)(4). Pub. L. 107–273 added par. (4).

1994—Subsec. (a). Pub. L. 103–322, § 110506(a)(2), struck out concluding sentence which read as follows: “Notwithstanding any other provision of this section, if a defendant is found by the court to be in possession of a controlled substance, thereby violating the condition imposed by section 3563(a)(3), the court shall revoke the sentence of probation and sentence the defendant to not less than one-third of the original sentence.”

Subsec. (a)(2). Pub. L. 103–322, § 110506(a)(1), substituted “resentence the defendant under subchapter A” for “impose any other sentence that was available under subchapter A at the time of the initial sentencing”.

Subsec. (b). Pub. L. 103–322, § 110506(b), amended subsec. (b) generally. Prior to amendment, subsec. (b) read as follows:

“(b) Mandatory Revocation for Possession of a Firearm.—If the defendant is in actual possession of a firearm, as that term is defined in section 921 of this title, at any time prior to the expiration or termination of the term of probation, the court shall, after a hearing pursuant to Rule 32.1 of the Federal Rules of Criminal Procedure, revoke the sentence of probation and impose any other sentence that was available under subchapter A at the time of the initial sentencing.”

1990—Subsec. (a)(1). Pub. L. 101–647 substituted “or modifying” for “of modifying”.

1988—Subsec. (a). Pub. L. 100–690, § 7303(a)(2), inserted at end “Notwithstanding any other provision of this section, if a defendant is found by the court to be in possession of a controlled substance, thereby violating the condition imposed by section 3563(a)(3), the court shall revoke the sentence of probation and sentence the defendant to not less than one-third of the original sentence.”

Subsecs. (b), (c). Pub. L. 100–690, § 6214, added subsec. (b) and redesignated former subsec. (b) as (c).

Amendment by section 7303(a)(2) of Pub. L. 100–690 applicable with respect to persons whose probation, supervised release, or parole begins after Dec. 31, 1988, see section 7303(d) of Pub. L. 100–690, set out as a note under section 3563 of this title.

Section effective Nov. 1, 1987, and applicable only to offenses committed after the taking effect of this section, see section 235(a)(1) of Pub. L. 98–473, set out as a note under section 3551 of this title.