In AWB Limited v Cole [No 2] [2006] FCA 913; (2006) 233 ALR 453 at 460463 [26][40], Young J reviewed the authorities from which (without reciting the authorities to which his Honour referred) I have taken the following principles:
(1) As a general rule the starting point is that all issues of fact and law should be determined at the one time.
(2) A party seeking the determination of separate questions must satisfy the Court that it is 'just and convenient' for the order to be made. The order must be made on concrete facts, either established or agreed, for the purpose of quelling a controversy between the parties so as to produce a conclusive or final judicial decision on the issue, which is of a real, not hypothetical, importance to the determination of the controversy.
(3) There are special problems where the separate issue involves a mixed question of fact and law, although it may still be able to be decided as a separate issue. However, care must be taken in precisely formulating the question and specifying the facts upon which it is to be decided.
(4) The Court must have all relevant matters before it as a precondition of it being asked to exercise its discretion if the separate question involves the grant or refusal of declaratory relief.
(5) It may still be appropriate to determine a separate question even if it will not resolve all the issues, provided that there is a strong prospect that the parties will agree upon the result when the core of the dispute has been decided or if the decision will obviate unnecessary and expensive hearings of other questions.
(6) Generally speaking an issue will not be appropriate for separate determination if it is simply one of two or more alternative ways in which an applicant or plaintiff frames its case and its determination would leave other significant issues unresolved.
(7) It is relevant to consider whether: