Appointment of ad hoc judges allows High Court judges to sit when quorum lacking, subject to consent and consultation. If a quorum of Supreme Court judges is not available, the Chief Justice may request, with the President's prior consent and after consulting the High Court Chief Justice, the attendance of a duly qualified High Court judge as an ad hoc Judge; that judge must prioritize attendance and, while sitting, exercise all jurisdiction, powers and privileges and discharge the duties of a Supreme Court judge.