LAW ON THE ESTABLISHMENT OF EXTRAORDINARY CHAMBERS IN THE COURTS OF CAMBODIA FOR THE PROSECUTION OF CRIMES COMMITTED DURING THE PERIOD OF DEMOCRATIC KAMPUCHEA
CHAPTER II - COMPETENCE
Article 6
The Extraordinary Chambers shall have the power to bring to trial all Suspects who committed or ordered the commission of grave breaches of the Geneva Conventions of 12 August 1949, such as the following acts against persons or property protected under provisions of these Conventions, and which were committed during the period 17 April 1975 to 6 January 1979:
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taking civilians as hostages.
EDIT.