Witness from prison
205. A prisoner who is in a prison may be subpoenaed as a witness only if the court before which the prisoner is to appear as a witness authorizes that the prisoner be subpoenaed as a witness, and the court may give such authority only if it is satisfied that the evidence in question is reasonably necessary and material and that the public safety or order will not be endangered by the calling of the witness.
Removal of accused from one prison to another for purposes of attending criminal proceedings
365. When an accused is in custody and it becomes necessary that the accused be removed from one prison to another prison for the purpose of attending his or her trial, the magistrate of the district in which the accused is in custody must issue a warrant for the removal of the accused to such other prison.
1. States Parties shall, in accordance with the provisions of this Part and under procedures of national law, comply with requests by the Court to provide the following assistance in relation to investigations or prosecutions:
(f) The temporary transfer of persons as provided in paragraph 7;