Rule 4 Joinder of parties

All the parties to a regulated agreement, and any surety, shall be made parties to any proceedings relating to the agreement, subject to the discretion of [^f1 the judge or district judge as the case may be] to direct otherwise at the hearing.

Without prejudice to paragraph (1), [ the judge or district judge as the case may be] may, on an ex parte application grounded upon an affidavit setting forth the facts as provided by section 70(3) or 73(8), make an order that the supplier or the negotiator, as the case may be, shall be made a party to the proceedings against the creditor, and [ the judge or district judge as the case may be] may, before making such order, require such notice of the application to be served as he thinks fit.