The Minister has not, on the hearing of the appeal, sought to dispute the finding of Davies J., affirmed by a majority of the Full Federal Court, that each of the deportation orders purportedly made on 20 August 1986 was intrinsically flawed by an error of law in that it was made for an impermissible purpose. As we followed the argument, two main submissions were advanced against the grant of declaratory relief. One related to the lawfulness of the appellants' detention. It was to the effect that, notwithstanding the invalidity of the deportation orders, an "Officer under the Act may properly act upon it in determining to exercise his powers under Sections 38 and 39". The other main submission advanced on behalf of the respondent Minister related to whether, even if the appellants' detention was unlawful, declaratory relief was warranted or appropriate. That submission would seem to be based on the appellants' difficulty in penetrating the fortress of officialdom to identify the particular person or persons ultimately responsible for their continued detention at Villawood. It was to the effect that there "was no evidence that the determination of detention was by the Minister, by his Delegate, as distinct from another "Officer" for the purposes of Section 38 and Section 39" of the Act and that, in these circumstances, Davies J. had been correct in refusing to grant declaratory relief since it had not been shown that the persons responsible for the appellants' detention in custody were persons for whose conduct the Minister was vicariously liable. It was suggested that the effect of declaratory relief would be to preclude the Minister from disputing such vicarious liability in proceedings for false imprisonment which the appellants have instituted against the Minister in the Supreme Court of New South Wales.