It is not clear what is the nature of the review provided for by s 46(4). The subsection refers, in its terms, to the nature of the orders which, on such review, the Court may make: “discharge or vary”. It does not indicate the nature of the proceeding brought for that purpose or the principles by reference to which the proceeding is to be dealt with. Thus, the section does not state in terms whether, on such a review, the Court of Appeal deals with the application by re-hearing ab initio, by a re-hearing of the kind otherwise provided in s 75A of the Supreme Court Act 1970, or by a more restricted review … [the question] has been referred to in passing in other cases. In Knaggs v Solicitors’ Statutory Committee (Court of Appeal NSW, 8 October 1990 unreported) Kirby P said (at 6):
“This process [under s 46(4) of the Supreme Court Act] is not an appeal, as such. However, it seems to me that the claimant must show that [the Judge of Appeal's] discretion miscarried. Otherwise, every discretionary practice decision made by a Judge of Appeal under s 46(1) sitting alone would be open to complete reargument as if the order made under that section had never been pronounced. I do not believe that such was the intention of the Act, providing as it does in s 46 for the economic deployment of the Judges of Appeal.”