(b) destroys or seriously damages the facilities of an airport serving international civil

aviation or aircraft not in service located thereon or disrupts the services of the

airport,

if such an act endangers or is likely to endanger safety at that airport.

3. Any person also commits an offence if that person:

(a) makes a threat to commit any of the offences in subparagraphs (a), (b), (c), (d), (f),

(g) and (h) of paragraph 1 or in paragraph 2 of this Article; or

(b) unlawfully and intentionally causes any person to receive such a threat,

under circumstances which indicate that the threat is credible.

4. Any person also commits an offence if that person:

(a) attempts to commit any of the offences set forth in paragraph 1 or 2 of this Article;

or

(b) organizes or directs others to commit an offence set forth in paragraph 1, 2, 3 or

4(a) of this Article; or

(c) participates as an accomplice in an offence set forth in paragraph 1, 2, 3 or 4(a) of

this Article; or

(d) unlawfully and intentionally assists another person to evade investigation,

prosecution or punishment, knowing that the person has committed an act that

constitutes an offence set forth in paragraph 1, 2, 3, 4(a), 4(b) or 4(c) of this Article,

or that the person is wanted for criminal prosecution by law enforcement

authorities for such an offence or has been sentenced for such an offence.

5. Each State Party shall also establish as offences, when committed intentionally,

whether or not any of the offences set forth in paragraph 1, 2 or 3 of this Article is

actually committed or attempted, either or both of the following:

(a) agreeing with one or more other persons to commit an offence set forth in

paragraph 1, 2 or 3 of this Article and, where required by national law, involving an

act undertaken by one of the participants in furtherance of the agreement; or

(b) contributing in any other way to the commission of one or more offences set forth

in paragraph 1, 2 or 3 of this Article by a group of persons acting with a common

purpose, and such contribution shall either:

(i) be made with the aim of furthering the general criminal activity or purpose of

the group, where such activity or purpose involves the commission of an

offence set forth in paragraph 1, 2 or 3 of this Article; or

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