Part III – General Provisions Relating to Requests for Assistance
20. Requests for assistance.
(1) This Part applies to a request by the ICC for assistance that is made under –
(b) any of the following articles of the Statute –
(iii) article 64 (which relates to various measures that can be taken by the Trial Chamber);
Assistance of States in the attendance and testimony of witnesses and production of documents
EDIT.