52. Amendments of statements of case
(1) A party may amend his statement of case at any time before it has been served on any other party.
(2) If his statement of case has been served, a party may amend it only with the written consent of all the other parties or with the Court's permission.
(3) If a statement of case has been served, an application to amend it by removing, adding or substituting a party must be made in accordance with Rule 56.