Соответствующая норма
Practice Relating to Rule 67. Inviolability of Parlementaires
The Hellenic Territorial Army’s Internal Service Code (1984), as amended, provides: “It is forbidden for members of the armed forces: … To shoot or hold as captive an enemy envoy who waves the white flag.” 
Greece, Hellenic Territorial Army Regulation of Internal Service Code, Presidential Decree 130/1984 (Military Regulation 20-1), as amended, Article 15(g).