The test for a Sanderson or Bullock costs order is that stated by Gibbs CJ in Gould v Vaggelas: (1) it was reasonable for the plaintiff to proceed against the successful defendant, and (2) the conduct of the unsuccessful defendant made it fair to impose liability for the successful defendant's costs. The statement in Norwest Refrigeration that claims must be 'interdependent' or 'alternative' does not impose an additional precondition but merely identifies examples of circumstances demonstrating reasonableness. Where an employer is found not liable on appeal, the s 151Z(2) reduction of damages is no longer required and the plaintiff is entitled to full general law damages. Questions of hardship do not affect entitlement to restitution of an interim payment under UCPR r 51.54.
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