Support of Terrorism (18 U.S.C. More precisely, Section 2339A outlaws:
(1) whoever
(2) [knowingly]
(3)(a) attempts to, 
(b) conspires to, or 
(c) actually
(4)(a) provides material support or resources, or
(b) conceals or disguises
i. the nature,
ii. location, 
iii. source, or 
iv. ownership
of material support or resources 
(5) knowing or intending that they be used 
(a) in preparation for, 
(b) in carrying out,
(c) in preparation for concealment of an escape from, or
(d) in carrying out the concealment of an escape from
(5) an offense identified as a federal crime of terrorism. Material Support

Section 2339A defines "material support" to encompass "any property, tangible or intangible, or service." An attempt to provide material support in violation of Section 2339A and actually providing such assistance are punished the same: imprisonment for not more than 15 years (for any term of years or life, if death results from the commission of the offense), and/or a fine of not more than $250,000 (not more than $500,000 for an organization)(or not more than twice the amount of gain or loss associated with the offense). Under the provisions of 18 U.S.C. Extraterritorial Jurisdiction

Unlike Section 2339B, Section 2339A has neither a general nor a descriptive statement of extraterritorial jurisdiction. In its present form, Section 2339B condemns:
(1) whoever
(2) knowingly
(3)(a) attempts to provide, 
(b) conspires to provide, or 
(c) provides
(4) material support or resources
(5) to a foreign terrorist organization
(6) knowing that the organization
(a) has been designated a foreign terrorist organization, or 
(b) engages, or has engaged, in "terrorism" or "terrorist activity." Knowingly

Section 2339B has two knowledge elements. In H umanitarian Law Project , the Supreme Court concluded that Section 2339B, as applied, was not unconstitutionally vague; did not constitute an abridgement of the First Amendment right to free speech; and did not impermissibly intrude on the right of free association. In others, it describes the circumstances under which it reaches offenses committed overseas. Although neither Section 2339B nor Section 2339A creates a private civil cause of action, 18 U.S.C.
The material support statutes, 18 U.S.C. §§2339A and 2339B, have been among the most frequently prosecuted federal anti-terrorism statutes. Section 2339A outlaws:
(1) whoever
(2) [knowingly]
(3)(a) attempting to,
(b) conspiring to, or
(c) actually
(4)(a) providing material support or resources, or
(b) concealing or disguising
(i) the nature,
(ii) location,
(iii) source, or
(iv) ownership of material support or resources
(5) knowing or intending that they be used
(a) in preparation for,
(b) in carrying out,
(c) in preparation for concealment of an escape from, or
(d) in carrying out the concealment of an escape from
(6) an offense identified as a federal crime of terrorism.
Section 2339B outlaws:
(1) whoever
(2) knowingly
(3)(a) attempting to provide,
(b) conspiring to provide, or
(c) actually providing
(4) material support or resources
(5) to a foreign terrorist organization
(6) knowing that the organization
(a) has been designated a foreign terrorist organization, or
(b) engages, or has engaged, in "terrorism" or "terrorist activity."
The sections use a common definition for the term "material support or resources": any service or tangible or intangible property. The Supreme Court in Humanitarian Law Project upheld Section 2339B, as applied, against challenges that it was unconstitutionally vague and inconsistent with the First Amendment's freedom of speech and freedom of association requirements. Violations of Section 2339A are punishable by imprisonment for not more than 15 years; violations of Section 2339B by imprisonment for not more than 20 years. Although neither section creates a civil cause of action for victims, treble damages and attorneys' fees may be available for some victims under 18 U.S.C. §2333. Section 2339B has two extraterritorial jurisdiction provisions. One is general (there is extraterritorial jurisdiction over an offense under this section) and the other descriptive (there is extraterritorial jurisdiction over an offender under this section if the offender is a U.S. national, etc.). Section 2339A has no such provisions, but it is likely applicable overseas at least in cases in which its predicate offenses have extraterritorial reach. This report is available in an abridged version as CRS Report R41334, Terrorist Material Support: A Sketch of 18 U.S.C. §2339A and §2339B, by Charles Doyle.