Section 5:

5. Any person also commits an offence if that person— (a) participates as an accomplice in an offence as set forth in paragraph 1 or 4 of this Article; (b) organises or directs others to commit an offence as set forth in paragraph 1 or 4 of this Article; (c) contributes to the commission of one or more offences as set forth in paragraphs 1 or 4 of this Article by a group of persons acting with a common purpose. Such contribution shall be intentional and shall either— (i) be made with the aim of furthering the criminal activity or criminal purpose of the group, where such activity or purpose involves the commission of an offence as set forth in paragraph 1 of this Article; or (ii) be made in the knowledge of the intention of the group to commit an offence as set forth in paragraph 1 of this Article. Article 3 This Convention shall not apply where the offence is committed within a single State, the alleged offender is a national of that State and is present in the territory of that State and no other State has a basis under Article 7, paragraph 1, or Article 7, paragraph 2, to exercise jurisdiction, except that the provisions of Articles 12 to 18 shall, as appropriate, apply in those cases. Article 4 Each State Party shall adopt such measures as may be necessary— (a) to establish as criminal offences under its domestic law the offences set forth in Article 2; (b) to make those offences punishable by appropriate penalties which take into account the grave nature of the offences. Article 5