(1) The Registrar may give such directions as the Registrar thinks appropriate regarding—
(a) the proposed contents of a leave application book or an appeal book;
(b) the settling of the contents of a leave application book or an appeal book; or
(c) the addition to or variation of the contents of those books.
(2) For the purpose of settling the contents of a leave application book or an appeal book, the Registrar may—
(a) consult the parties;
(b) consult the judge or other judicial officer or tribunal member whose decision is the subject of the application for leave to appeal or the appeal;
(c) give directions and, if the Registrar considers it appropriate, require the attendance of the parties;
(d) on an appeal by leave, direct that the contents of the leave application book comprise the whole or part of the appeal book; and
(e) direct that a party file such copies of documents for the use of the Court of Appeal as the Registrar considers appropriate.
(3) Nothing in this Rule limits any powers of the Registrar under Rule 64.21.