Any and every valuation, or alteration of the valuation, of any land made, or purporting to be made, under this Act by the Valuer-General shall be deemed to be correct until proved otherwise upon objection or appeal or until altered or further altered pursuant to a provision of this section.
The argument based by the Valuer-General on this provision was, first, that the valuation which is presumed to be correct is the figure arrived at as a result of the process of valuation - the unimproved value in dollars and cents - and, secondly, that in order to displace the presumption it is not enough to show that an error in principle was made by the Valuer-General in arriving at the value, because the valuation, though unsoundly based, might nevertheless not be excessive. The word "valuation" is used in the Act in shifting senses, and, as was said in Kilcoy Shire Council v. Brisbane City Council [11] , it "covers both the activity of assessing value and the reduction of that assessment to written form". However, I accept that in s. 13 (7) it at least includes the amount of the valuation, and that there is a presumption that the value in money terms shown by the Valuer-General in his notice of valuation is correct. The question then is whether a court on appeal is bound to accept the Valuer-General's figure as correct unless it is positively established that the true value is lower, or whether it is enough to show that the value was reached as the result of an error in principle. In my opinion once it is shown that in making the valuation the Valuer-General acted upon a wrong principle, or made a serious error of fact, the presumption created by s. 13 (7) is rebutted. It is true that the Valuer-General might by coincidence reach the right result by a wrong process of reasoning, but I cannot attribute to the legislature the capricious intention that a valuation shown to have been erroneously made should be presumed correct simply because by mere chance the Valuer-General may have hit on the right figure. If, for example, lands were valued as suitable for high rise city buildings although the law forbad them to be put to that use, or as rich agricultural land when in fact they had been rendered useless by excessive salinity, it would be absurd to hold that the valuation, although shown to be radically wrong, still must be deemed correct. In my opinion once it is shown that a valuation was made by a method fundamentally erroneous the presumption is rebutted. In the present case the presumption of correctness was rebutted once it was held that the submerged land should be valued in its actual state and not in the notional state in which the Valuer-General had valued it.
1. (1971) 124 C.L.R. 60, at p. 67.