No appointment may be made under section 11 or section 11A except on a certificate signed by the Chief Justice and the Chief High Court Judge to the effect that, in their opinion, it is necessary for the due conduct of the Court's business that one or more temporary Judges, or (as the case may require) for one or more acting Judges, to be appointed.
Sections 11A and 11B were inserted, as from 14 October 1981, by section 2(1) Judicature Amendment Act 1981 (1981 No 40).
Section 11B was substituted, as from 1 January 2004, by section 48(1) Supreme Court Act 2003 (2003 No 53). See sections 50 to 55 of that Act as to the transitional and savings provisions.