(1) In general.—Subject to the exceptions in subsection (c), a person who unlawfully and intentionally—
(A) when the purpose of the act, by its nature or context, is to intimidate a population, or to compel a government or an international organization to do or to abstain from doing any act—
(B) transports on board a ship—
any explosive or radioactive material, knowing that it is intended to be used to cause, or in a threat to cause, death to any person or serious injury or damage for the purpose of intimidating a population, or compelling a government or an international organization to do or to abstain from doing any act;
(iii) any source material, special fissionable material, or equipment or material especially designed or prepared for the processing, use, or production of special fissionable material, knowing that it is intended to be used in a nuclear explosive activity or in any other nuclear activity not under safeguards pursuant to an International Atomic Energy Agency comprehensive safeguards agreement, except where—
(iv) any equipment, materials, or software or related technology that significantly contributes to the design or manufacture of a nuclear weapon or other nuclear explosive device, with the intention that it will be used for such purpose, except where—
(v) any equipment, materials, or software or related technology that significantly contributes to the delivery of a nuclear weapon or other nuclear explosive device, with the intention that it will be used for such purpose, except where—
any equipment, materials, or software or related technology that significantly contributes to the design, manufacture, or delivery of a biological or chemical weapon, with the intention that it will be used for such purpose;
transports another person on board a ship knowing that the person has committed an act that constitutes an offense under section 2280 or subparagraph (A), (B), (D), or (E) of this section  or an offense set forth in an applicable treaty, as specified in section 2280(d)(1), and intending to assist that person to evade criminal prosecution;
attempts to do any act prohibited under subparagraph (A), (B) or (D), or conspires to do any act prohibited by subparagraphs (A) through (E) or subsection (a)(2),
shall be fined under this title, imprisoned not more than 20 years, or both; and if the death of any person results from conduct prohibited by this paragraph, shall be imprisoned for any term of years or for life.
A person who threatens, with apparent determination and will to carry the threat into execution, to do any act prohibited under paragraph (1)(A) shall be fined under this title, imprisoned not more than 5 years, or both.
(b) Jurisdiction.—There is jurisdiction over the activity prohibited in subsection (a)—
(1) in the case of a covered ship, if—
(A) such activity is committed—
in the United States, including the territorial seas; or
during the commission of such activity, a national of the United States is seized, threatened, injured, or killed; or
the offender is later found in the United States after such activity is committed;
(c) Exceptions.—This section shall not apply to—
the activities of armed forces during an armed conflict, as those terms are understood under the law of war, which are governed by that law; or
activities undertaken by military forces of a state in the exercise of their official duties.
(1) Civil Forfeiture.—
(2) Applicable Procedures.—
Seizures and forfeitures under this section shall be governed by the provisions of chapter 46 of title 18, United States Code, relating to civil forfeitures, except that such duties as are imposed upon the Secretary of the Treasury under the customs laws described in section 981(d) shall be performed by such officers, agents, and other persons as may be designated for that purpose by the Secretary of Homeland Security, the Attorney General, or the Secretary of Defense.