44 His Honour found (at [33]-[42]) that this court had misapplied the Maroota principles in this case, and had taken into account irrelevant considerations (1) in terms of the asserted "trajectory", and (2) consideration of all the additions made to the park, of lands other than the subject lands, between the date of claim and the LEC hearing. His Honour said (at [33]-[39] and [41]-[42], with emphasis added by me):
"[33] The contention of the Minister was that the subsequent history confirmed what was foreseeable at the date of the land claim , namely that it was unlikely that DMR objections would prevail over the strong reasons supporting the establishment of a continuous chain of areas reserved for nature conservation, particularly in the area of the escarpment covered by Budderoo National Park and Macquarie Pass National Park and the intervening Gap, and the strong desire of NPWS supported by the Minister for Environment that this happen. It was put that this was particularly so in circumstances where the purpose of nature conservation could be achieved without precluding mining at a depth below 15 metres , as proposed by NPWS in 1981 and progressively accepted by DMR in 1987 (as regards part of the western part of the claim) and in 1991 (as regards the eastern part of the claim). I would add that another relevant matter is that, as early as 26 August 1985, the Minister for Mineral Resources agreed that even the area over which it had objections "would need to be managed in accordance with National Park guidelines" (Blue 222).
[34] In my opinion para [117] of the judgment does disclose errors of law in dealing with this contention.
[35] First, it shows that the primary judge considered that any "trajectory" that might support a finding that the land was likely to be needed had to be "at the appropriate government level". In my opinion, this is a misapplication of what was said in Maroota . The question of whether land was needed must be decided with reference to what the Government requires, and that of course means a requirement at the level of executive Government. However, where the question is whether the land is likely to be needed, it is a question as to whether it is likely that there will in the future be a Government requirement; and if this is addressed by considering whether there is a trajectory at the relevant time, this need not then be a trajectory existing at the appropriate Government level, but only a trajectory towards a requirement at the appropriate Government level.
[36] Second, para [117] particularly read with para [115] indicates that the primary judge considered it was relevant that the claimed land still had not been included in Budderoo National Park. The submission of the Minister was that, because the land claim precluded inclusion, this consideration could not be relevant; but we were not referred to any statutory provision which had that effect, and I am not aware of any such statutory provision.
[37] However, in my opinion , it appears from the history I have given that , at least from March 2003, the existence of the land claim was recognised and given effect to as a practical obstacle to inclusion of the land in Budderoo National Park (although this was apparently overlooked in the 2003 election undertaking); so that non-inclusion of the land in Budderoo National Park between March 2003 to the hearing (December 2007) could not be relevant, except conceivably in a tenuous and highly indirect way not suggested in the primary judge's reasons (that delay by the Minister in determining the claim between March 2003 and December 2007 somehow bore on the question whether, as at March 1986, the land was likely to be needed for nature conservation).
[38] As regards the period from March 1986 to March 2003, the position is less clear: it is not apparent that the land claim was an operative factor in the non-inclusion of the land during that period. However, apart from the land claim, the only matter standing in the way of inclusion of the lands in Budderoo National Park (both when it was originally established and thereafter) was opposition from DMR; so it was the likelihood (as at the date of the claim) of the persistence and success of this opposition, on which some light could be shed by what happened in relation to DMR opposition after the claim, that was relevant, and not the bare fact of subsequent non-inclusion of the land. So in my opinion, while reference to non-inclusion of the land in Budderoo National Park from March 1986 to March 2003 would not itself have manifested error, in its context and in combination with the other matters I have mentioned, it does do so.
[39] In my opinion, having regard to these considerations, the primary judge did not decide the correct question, namely whether the land was, as a matter of fact, likely to be needed for an essential purpose; but rather he addressed a question distorted by irrelevant considerations, namely whether any trajectory towards the existence of such need was itself at the appropriate government level, and whether the land had been included in Budderoo National Park up to the date of the hearing.
…
[41] The appeal to this Court in this case is against a decision with respect to a question of law; and what is being challenged is not the exercise of a discretion but a determination whether or not a state of affairs satisfies a statutory description . In relation to such challenges, I accept that a finding that a judge has taken into account irrelevant considerations may in some circumstances not involve an erroneous decision on a question of law, but may merely be an error in reasoning on a question of fact. However, in the present case the primary judge's reliance on irrelevant considerations does, in my opinion, show that he was misapplying the statutory description and thus was making an error of law.
[42] The next question is whether the errors I have identified were material to the primary judge's decision. In my opinion, they were: there is a reasonable possibility that, but for those errors, the decision could have been different ."
45 It can be seen that Hodgson JA, speaking for the Court of Appeal's majority, noted (at [33]) that the Minister relied on subsequent events to confirm a foresight at the date of claim that DMR objections were unlikely to prevail over the argument in favour of executive reservation of the claimed and other lands to establish a "continuous chain of areas" (or a "corridor" as some of the research described it) for nature conservation, particularly in the area of the escarpment already in national park.
46 The majority then held (in [35]) that "where the question is whether the land is likely to be needed, it is a question as to whether it is likely that there will in the future be a Government requirement…and…this need…be…only a trajectory towards a requirement at the appropriate Government level." Hodgson JA's majority judgment dealt with the period March 1986 to March 2003, a period of 17 years (in [38]), and concluded (in [39]), on the basis of all the circumstances, including that history, that in my primary judgment I had framed and answered the wrong question.
47 It should be noted that for much of this 17 year time period the existence of the outstanding land claim was simply overlooked (see the Lands Department's contradictory correspondence in February 2003 regarding the transfer of the eastern lands to National Parks - Exhibit M2, fols 440-1). There are hints in Basten JA's judgment (at [77]), that 17 years might be an "impermissible" period.
Consideration