Соответствующая норма
Germany
Practice Relating to Rule 108. Mercenaries
Section A. Definition of mercenaries
Germany’s Military Manual (1992) defines a mercenary as “any person who is motivated to take a direct part in the hostilities by the desire for private gain without being a national or a member of the armed forces of a party to the conflict (Art. 47 [of the 1977 Additional Protocol I]). In addition, the provisions of the 1989 Mercenary Convention apply.” 
Germany, Humanitarian Law in Armed Conflicts – Manual, DSK VV207320067, edited by The Federal Ministry of Defence of the Federal Republic of Germany, VR II 3, August 1992, English translation of ZDv 15/2, Humanitäres Völkerrecht in bewaffneten Konflikten – Handbuch, August 1992, § 303.