Section 700 — Criminal Code: Contents of subpoena

A subpoena shall require the person to whom it is directed to attend, at a time and place to be stated in the subpoena, to give evidence and, if required, to bring with him anything that he has in his possession or under his control relating to the subject-matter of the proceedings. A person who is served with a subpoena issued under this Part shall attend and shall remain in attendance throughout the proceedings unless he is excused by the presiding judge, justice or provincial court judge.