(II) a consular officer or the Attorney General knows, or has reasonable ground to believe, is likely to engage after entry in any terrorist activity (as defined in clause (iii)), is excludable. An alien who is an officer, official, representative, or spokesman of the Palestine Liberation Organization is considered, for purposes of this chapter, to be engaged in a terrorist activity.
(ii) ''Terrorist activity'' defined
As used in this chapter, the term ''terrorist activity'' means any activity which is unlawful under the laws of the place where it is committed (or which, if committed in the United States, would be unlawful under the laws of the United States or any State) and which involves any of the following:
(I) The highjacking or sabotage of any conveyance (including an aircraft, vessel, or vehicle).
(II) The seizing or detaining, and threatening to kill, injure, or continue to detain, another individual in order to compel a third person (including a governmental organization) to do or abstain from doing any act as an explicit or implicit condition for the release of the individual seized or detained.
(III) A violent attack upon an internationally protected person (as defined in section 1116(b)(4) of title 18) or upon the liberty of such a person.
(IV) An assassination.
(V) The use of any -
(a) biological agent, chemical agent, or nuclear weapon or device, or
(b) explosive or firearm (other than for mere personal monetary gain), with intent to endanger, directly or indirectly, the safety of one or more individuals or to cause substantial damage to property.
(VI) A threat, attempt, or conspiracy to do any of the foregoing.
(iii) ''Engage in terrorist activity'' defined
As used in this chapter, the term ''engage in terrorist activity'' means to commit, in an individual capacity or as a + member of an organization, an act of terrorist activity or an act which the actor knows, or reasonably should know, affords material support to any individual, organization, or government in conducting a terrorist activity at any time, including any of the following acts:
(I) The preparation or planning of a terrorist activity.
(II) The gathering of information on potential targets for terrorist activity.
(III) The providing of any type of material support, including a safe house, transportation, communications, funds, false identification, weapons, explosives, or training, to any individual the actor knows or has reason to believe has committed or plans to commit a terrorist activity.
(IV) The soliciting of funds or other things of value for terrorist activity or for any terrorist organization.
(V) The solicitation of any individual for membership in a terrorist organization, terrorist government, or to engage in a terrorist activity.