1. Any ground of defence which has arisen after action brought but before the defendant has delivered his defence, and before the time limited for his doing so has expired, may be raised by the defendant in his defence, either alone or together with other grounds of defence; and if, after a defence has been delivered, any ground of defence arises to any set-off or counterclaim alleged therein by the defendant, it may be raised by the plaintiff in his reply, either alone or together with any other ground of reply.

2. Where any ground of defence arises after the defendant has delivered a defence, or after the time limited for his doing so has expired, the defendant may, and where any ground of defence to any set-off or counterclaim arises after reply, or after the time limited for delivering a reply, has expired, the plaintiff may, within eight days after such ground of defence has arisen, or any subsequent time by leave of the Court, deliver a further defence or further reply as the case may be, setting forth the same.

3. Whenever any defendant, in his defence, or in any further defence as in rule 2 mentioned alleges any ground of defence which has arisen after the commencement of the action, the plaintiff may deliver a confession of such defence (which confession may be in the Form No 7 in Appendix C), and may thereupon sign judgment for his costs up to the time of the pleading of such defence, unless the Court shall, either before or after the delivery of such confession, otherwise order.