Part V – Domestic Procedures for Other Types of Co-operation
Locating or Identifying Persons of Things
46. Protection of witnesses.
(1) The applicable law with respect to compelling a person to appear before a Registrar under section 44 or section 45 and to give evidence or answer questions, or to produce documents or other articles, is the law specified in subsection (2); and that law applies with any necessary modifications.
Witness protection - authority - ICC proceedings
EDIT.