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International Convention against the Recruitment, Use, Financing and Training of Mercenaries, 4 December 1989.
For the purposes of the present Convention,
1. A mercenary is any person who:
(a) Is specially recruited locally or abroad in order to fight in an armed conflict;
(b) Is motivated to take part in the hostilities essentially by the desire for private gain and, in fact, is promised, by or on behalf of a party to the conflict, material compensation substantially in excess of that promised or paid to combatants of similar rank and functions in the armed forces of that party;
(c) Is neither a national of a party to the conflict nor a resident of territory controlled by a party to the conflict;
(d) Is not a member of the armed forces of a party to the conflict; and
(e) Has not been sent by a State which is not a party to the conflict on official duty as a member of its armed forces.
2. A mercenary is also any person who, in any other situation:
(a) Is specially recruited locally or abroad for the purpose of participating in a concerted act of violence aimed at :
(i) Overthrowing a Government or otherwise undermining the constitutional order of a State; or
(ii) Undermining the territorial integrity of a State;
(b) Is motivated to take part therein essentially by the desire for significant private gain and is prompted by the promise or payment of material compensation;
(c) Is neither a national nor a resident of the State against which such an act is directed;
(d) Has not been sent by a State on official duty; and
(e) Is not a member of the armed forces of the State on whose territory the act is undertaken.