14 The Act, s27(1)(a), affords power to antedate the order. The proclamation does not render the exercise futile. The proclamation was made following the recommendation made by the Board. The decision of the Tribunal was, effectively, that of the Board, and if that decision is quashed as and from the date of its making, the recommendation and its consequence has no foundation and the proclamation has no legal effect. The respondents contended that the effect of the Act, s26, is to afford independent power rendering the making of the recommendation valid. That is, in part, correct and would provide a defence to any claim of impropriety. But the terms of s26(1)(b) relate to the implementation of "the decision" which, in this case, means the decision of the Board made through the Tribunal. Since that decision has been set aside by the orders here, any implementation is of no effect. A factor in any exercise of discretion is whether the making of a declaration attaches to a right (Minister for Industry and Commerce v East West Trading Co Pty Ltd (1986) 64 ALR 466; Minister for Immigration and Ethnic Affairs v Conyngham (1986) 11 FCR 528). Here the applicants, as adjoining landowners, had a right to object to the intended use of the neighbouring land. They had a right to have their objection, already limited by statute, determined according to law. They had a further right afforded by the Act for the review of the decision of the Tribunal. Those proceedings ought not be rendered futile. Had the adjoining land been cleared in accordance with its proclaimed status, it might be impossible to afford them a right of rehearing. Even where the remedy sought cannot undo the harm caused, the declaratory remedy nevertheless survives. Even when declaratory relief is insufficient to alter events completed, it might still be warranted. As Brennan J observed in Ainsworth v Criminal Justice Commission [1992] HCA 10; (1992) 106 ALR 11 at 22: