相关规则
Australia
Practice Relating to Rule 108. Mercenaries
Section A. Definition of mercenaries
Australia’s Defence Force Manual (1994) states:
A mercenary is any person who:
a. is specially recruited locally or abroad in order to fight in an armed conflict;
b. takes part in hostilities;
c. is motivated to take part in hostilities essentially for the desire for private gain and 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 ranks and functions in the armed forces of that party;
d. is neither a national of a party to the conflict nor a resident of the territory controlled by a party to the conflict;
e. is not a member of the armed forces of a party to the conflict; and
f. has not been sent by a State which is not Party to the conflict on official duty as a member of its armed forces. 
Australia, Manual on Law of Armed Conflict, Australian Defence Force Publication, Operations Series, ADFP 37 – Interim Edition, 1994, Glossary.
Australia’s Commander’s Guide (1994) states:
A mercenary is any person who:
a) is specially recruited locally or abroad in order to fight in an armed conflict;
b) does, in fact, take a direct part in the hostilities;
c) 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 ranks and functions in the armed forces of that Party;
d) is neither a national of a party to the conflict nor a resident of territory controlled by a Party to the conflict;
e) is not a member of the armed forces of a Party to the conflict; and
f) 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. 
Australia, Law of Armed Conflict, Commanders’ Guide, Australian Defence Force Publication, Operations Series, ADFP 37 Supplement 1 – Interim Edition, 7 March 1994, Glossary, p. xxiii.
Australia’s LOAC Manual (2006) defines “mercenary” as follows:
A mercenary is any person who:
a. is specially recruited locally or abroad in order to fight in an armed conflict;
b. takes part in hostilities;
c. is motivated to take part in hostilities essentially for the desire for private gain and 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 ranks and functions in the armed forces of that party;
d. is neither a national of a party to the conflict nor a resident of the territory controlled by a party to the conflict;
e. is not a member of the armed forces of a party to the conflict; and
f. has not been sent by a state which is not party to the conflict on official duty as a member of its armed forces. 
Australia, The Manual of the Law of Armed Conflict, Australian Defence Doctrine Publication 06.4, Australian Defence Headquarters, 11 May 2006, Glossary, p. 4.
The LOAC Manual (2006) replaces both the Defence Force Manual (1994) and the Commanders’ Guide (1994).