(1) A subpoena may be issued in an appeal only if leave to issue the subpoena has been given by:
(a) for an appeal heard by a Full Court--that Full Court; or
(b) for an appeal heard by a single Judge--that Judge.
(2) A document produced in compliance with a subpoena issued in accordance with subrule (1) may be inspected only with the leave of the Full Court referred to in paragraph (1)(a) or the Judge referred to in paragraph (1)(b).