PART V—DOMESTIC PROCEDURES FOR OTHER TYPES OF CO-OPERATION
Finding Persons or Things, and Obtaining Evidence
80. (1) The applicable law with respect to compelling a person to appear before a Judge under section 78 or 79 and to give evidence or answer questions, or to produce documents or other articles, is the law specified in sub¬section (2), which law shall apply with any necessary modifications.
Facilitating voluntary appearance of persons - national procedures for ICC proceedings
EDIT.