(1) If there is a representative claimant or defendant, an order of the court binds everyone whom that party represents.
(2) It may not however be enforced against a person who is not a party to the proceedings unless the person wishing to enforce it obtains permission from the court.
(3) An application for permission must be supported by evidence on affidavit and must be served on the person against whom it is wished to enforce the judgment.