120 Beyond this, however, the parties were not in agreement as to the applicable legal principles governing when the power to grant a permanent stay for abuse of process ought to be exercised. The dispute concerned the parties' interpretation of the seminal decision of the High Court in Mraz v R (1955) 93 CLR 493. That case concerned a misdirection that as an alternative verdict the jury could find the accused guilty of manslaughter in circumstances where the accused was charged with murder following the death, by "shock", of a woman he had raped. In Mraz Fullagar J held that a substantial miscarriage of justice had occurred by reason of the erroneous direction. His Honour stated (at 514) that if the accused "may thereby have lost a chance which was fairly open to him of being acquitted, there is, in the eyes of the law, a miscarriage of justice."
121 In Jago v District Court (NSW) (1989) 168 CLR 23, upon which the council relied, Mason CJ (at 33) referred to the "touchstone" of "fairness" "in the safeguarding of the interests of the accused". However, his Honour also stressed that the test of fairness "involves a balancing process, for the interests of the accused cannot be considered in isolation without regard to the community's right to expect that persons charged with criminal offences are brought to trial" (at 33). Ultimately, Mason CJ formulated the test for a permanent stay of a criminal trial thus (at 34, citations omitted):
To justify a permanent stay of criminal proceedings, there must be a fundamental defect which goes to the root of the trial "of such a nature" that nothing the trial judge can do in the conduct of the trial can relieve against its unfair consequences".
122 The council submitted that when regard was had to the formulations in Mraz and Jago, it was sufficient for it to demonstrate that as a consequence of the EPA requiring the construction of the Waniassa Street augmentation but refusing to issue a licence for the sewage pump station either before or after it was built, it might have lost the fundamental opportunity of an acquittal by availing itself of the only possible defence under s 122 of the Act to the offence charged under s 120, which once lost could not be remedied by any curial process.