s 37 Further provisions about directions under section 36.
(1) Subject to subsection (2), a direction has binding effect from the time it is made until the witness to whom it applies is discharged. In this section “ direction ” means a direction under section 36. (2) The court may discharge a direction if it appears to the court to be in the interests of justice to do so, and may do so either— (a) on an application made by a party to the proceedings, if there has been a material change of circumstances since the relevant time, or (b) of its own motion. (3) In subsection (2) “ the relevant time ” means— (a) the time when the direction was given, or (b) if a previous application has been made under that subsection, the time when the application (or last application) was made. (4) The court must state in open court its reasons for— (a) giving, or (b) refusing an application for, or for the discharge of, or (c) discharging, a direction and, if it is a magistrates’ court, must cause them to be entered in the register of its proceedings. (5) Criminal Procedure Rules may make provision— (a) for uncontested applications to be determined by the court without a hearing; (b) for preventing the renewal of an unsuccessful application for a direction except where there has been a material change of circumstances; (c) for expert evidence to be given in connection with an application for, or for discharging, a direction; (d) for the manner in which confidential or sensitive information is to be treated in connection with such an application and in particular as to its being disclosed to, or withheld from, a party to the proceedings.