(1) Rule 21 of the principal Rules shall be amended as follows.
(2) After paragraph (1) (a) there shall be inserted the following sub-paragraph—
(aa) in the case of a document to be served on the appropriate officer of the Crown Court—
(i) in the case of an appellant who is in custody, by delivering it to the person having custody of him, or
(ii) by delivering it to, or sending it by post addressed to, the appropriate officer at the Crown Court centre at which the conviction, verdict, finding or sentence appealed against was given or passed;
(3) The following shall be substituted for paragraph (2)—
(2) A person having custody of an appellant to whom a document is delivered in pursuance of paragraph (1) (a) (i) or (1) (aa) (i) of this Rule shall endorse on it the date of delivery and cause it to be forwarded forthwith to the Registrar or to the appropriate officer of the Crown Court, as the case may be.