Source: https://www.law.cornell.edu/uscode/text/18/115
Timestamp: 2019-04-19 18:50:04+00:00

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Whoever assaults, kidnaps, or murders, or attempts or conspires to kidnap or murder, or threatens to assault, kidnap, or murder, any person who formerly served as a person designated in paragraph (1), or a member of the immediate family of any person who formerly served as a person designated in paragraph (1), with intent to retaliate against such person on account of the performance of official duties during the term of service of such person, shall be punished as provided in subsection (b).
if the assault resulted in serious bodily injury (as that term is defined in section 1365 of this title, and including any conduct that, if the conduct occurred in the special maritime and territorial jurisdiction of the United States, would violate section 2241 or 2242 of this title) or a dangerous weapon was used during and in relation to the offense, a term of imprisonment for not more than 30 years.
A kidnapping, attempted kidnapping, or conspiracy to kidnap in violation of this section shall be punished as provided in section 1201 of this title for the kidnapping or attempted kidnapping of, or a conspiracy to kidnap, a person described in section 1201(a)(5) of this title.
A murder, attempted murder, or conspiracy to murder in violation of this section shall be punished as provided in sections 1111, 1113, and 1117 of this title.
A threat made in violation of this section shall be punished by a fine under this title or imprisonment for a term of not more than 10 years, or both, except that imprisonment for a threatened assault shall not exceed 6 years.
“United States official” means the President, President-elect, Vice President, Vice President-elect, a Member of Congress, a member-elect of Congress, a member of the executive branch who is the head of a department listed in 5 U.S.C. 101, or the Director of the Central Intelligence Agency.
This section shall not interfere with the investigative authority of the United States Secret Service, as provided under sections 3056, 871, and 879 of this title.
2002—Subsec. (b)(2). Pub. L. 107–273, § 4002(b)(9), substituted “or attempted kidnapping of, or a conspiracy to kidnap, a person” for “, attempted kidnapping, or conspiracy to kidnap of a person”.
Subsec. (b)(4). Pub. L. 107–273, § 11008(c), substituted “10” for “five” and “6” for “three”.
1996—Subsec. (a)(1)(A). Pub. L. 104–132, § 723(a)(1), inserted “or conspires” after “attempts”.
Subsec. (a)(2). Pub. L. 104–132, § 727(b)(1), which directed insertion of “, or threatens to assault, kidnap, or murder, any person who formerly served as a person designated in paragraph (1), or” after “assaults, kidnaps, or murders, or attempts to kidnap or murder”, was executed by making the substitution after “assaults, kidnaps, or murders, or attempts or conspires to kidnap or murder” to reflect the probable intent of Congress and the amendment by Pub. L. 104–132, § 723(a)(1). See below.
Pub. L. 104–132, § 723(a)(1), inserted “or conspires” after “attempts”.
Subsec. (b)(2). Pub. L. 104–132, § 723(a)(2), substituted “, attempted kidnapping, or conspiracy to kidnap” for “or attempted kidnapping” in two places.
Subsec. (b)(3). Pub. L. 104–132, § 723(a)(3), substituted “, attempted murder, or conspiracy to murder” and “, 1113, and 1117” for “or attempted murder” and “and 1113”, respectively.
Subsec. (d). Pub. L. 104–132, § 727(b)(2), added subsec. (d).
1994—Subsec. (b)(2). Pub. L. 103–322, § 330021(1), substituted “kidnapping” for “kidnaping” in two places.
Subsec. (b)(4). Pub. L. 103–322, § 330016(2)(C), substituted “fine under this title” for “fine of not more than $5,000”.
1986—Subsec. (a). Pub. L. 99–646, § 60, substituted “section 1114 of this title, or threatens to assault, kidnap, or murder, a United States official, a United States judge, a Federal law enforcement officer, or an official whose killing would be a crime under such section” for “18 U.S.C. 1114, as amended,”, “while engaged” for “while he is engaged”, and “official duties” for “his official duties”.
Subsec. (b)(2). Pub. L. 99–646, § 37(a), inserted “for the kidnapping or attempted kidnapping of a person described in section 1201(a)(5) of this title”.

References: § 4002
 § 11008
 § 723
 § 727
 § 723
 § 723
 § 723
 § 723
 § 727
 § 330021
 § 330016
 § 60
 § 37