A/RES/52/164 Page 4 2. Any person also commits an offence if that person attempts to commit an offence as set forth in paragraph 1 of the present article. 3. Any person also commits an offence if that person: (a) Participates as an accomplice in an offence as set forth in paragraph 1 or 2 of the present article; or (b) Organizes or directs others to commit an offence as set forth in paragraph 1 or 2 of the present article; or (c) In any other way contributes to the commission of one or more offences as set forth in paragraph 1 or 2 of the present article by a group of persons acting with a common purpose; such contribution shall be intentional and either be made with the aim of furthering the general criminal activity or purpose of the group or be made in the knowledge of the intention of the group to commit the offence or offences concerned. Article 3 This Convention shall not apply where the offence is committed within a single State, the alleged offender and the victims are nationals of that State, the alleged offender is found in the territory of that State and no other State has a basis under article 6, paragraph 1 or paragraph 2, of this Convention to exercise jurisdiction, except that the provisions of articles 10 to 15 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 of this Convention; (b) To make those offences punishable by appropriate penalties which take into account the grave nature of those offences. Article 5 Each State Party shall adopt such measures as may be necessary, including, where appropriate, domestic legislation, to ensure that criminal acts within the scope of this Convention, in particular where they are intended or calculated to provoke a state of terror in the general public or in a group of persons or particular persons, are under no circumstances justifiable by considerations of a political, philosophical, ideological, racial, ethnic, religious or other similar nature and are punished by penalties consistent with their grave nature. /...