Section 84 of the Supreme Court Act 1970

84. (1) Where any person (in this subsection called the vexatious litigant) habitually and persistently and without reasonable ground institutes vexatious legal proceedings, whether in the Court or in any inferior court, and whether against the same person or against different persons, the Court may, on the application of the Attorney-General, order that the vexatious litigant shall not, without leave of the Court, institute any legal proceedings in any court and that any legal proceedings instituted by the vexatious litigant in any court before the making of the order shall not be continued by the vexatious litigant without leave of the Court.

(2) Where any person (in this subsection called the vexatious litigant) habitually and persistently and without reasonable ground institutes vexatious legal proceedings against any person (in this subsection called the person aggrieved), whether in the Court or in any inferior court, the Court may, on the application of the person aggrieved, order that the vexatious litigant shall not, without leave of the Court, institute any legal proceedings against the person aggrieved in any court and that any legal proceedings instituted by the vexatious litigant against the person aggrieved in any court before the making of the order shall not be continued by the vexatious litigant without leave of the Court.

(3) The Court may from time to time rescind or vary any order made by it under subsection (1) or (2).

(4) Where the Court has made an order under subsection (1) or (2) against any person, the Court shall not give that person leave to institute or continue any proceedings unless the Court is satisfied that the proceedings are not an abuse of process and that there is a prima facie ground for the proceedings.