(1) A defendant who has pleaded shall be entitled to obtain from the party making discovery a copy of any affidavit of documents served on—
(a) the plaintiff by any other defendant to the proceeding;
(b) any other defendant by the plaintiff.
(2) Where the defendant has served a counter-claim joining another person with the plaintiff as defendant to the counter-claim in accordance with Rule 10.03 , paragraph (1), with any necessary modification, applies as if—
(a) the defendant were the plaintiff; and
(b) the plaintiff and the other person were the defendants.
(3) A third party who has pleaded shall be entitled to obtain from the party making discovery a copy of any affidavit of documents served—
(a) by the plaintiff on the defendant by whom the third party was joined;
(b) on the plaintiff by that defendant.