4L.—(1) On application by the prosecutor or the accused, a summons may be issued out of the trial court requiring the person to whom the summons is directed to—

(a) attend before the trial court and give evidence at the trial of the accused, and

(b) produce to that court any document or thing specified in the summons,

unless the court is satisfied that the person proposed to be summoned cannot give any material evidence or, as the case may be, produce any document or thing likely to be material evidence.

(2) A person who without just excuse disobeys a witness summons shall be guilty of contempt of the court out of which the summons was issued.

(3) This section is without prejudice to any other powers for enforcing the attendance of witnesses at the trial.

(4) In this section, ‘witness summons’ means a summons issued under subsection (1).]