A Written Statement (WS) can generally be amended or modified at any stage of legal proceedings. The court has the power to allow alterations to pleadings to clarify the real issues in dispute. However, amendments are typically not permitted after a trial has begun, unless the court is satisfied that the matter could not have been raised earlier despite due diligence. The general principle is to allow amendments, even if they introduce new defences, alter existing ones, or involve taking inconsistent pleas.