47 Secondly, the respondent submits that there should be a discount because the value that Mr Viarella attributed to the units on the residue lands in the before scenario included an element for a scarcity factor of privately owned lands with absolute water frontage, which was contributed to by reason of the carrying out of the cycleway public purpose. The cycleway proceeds on one side or the other of the Parramatta River. The respondent submits that under s 55(f) of the Just Terms Act, this increase in the value of the residue lands should be deducted from Mr Viarella's assessment. The applicant submits that, while this may be technically correct, such exclusivity would have had an almost inestimable effect. I accept the respondent's submission: see [10] above. Again there is no valuation evidence to assist in determining the quantum of the discount. Doing the best I can in the absence of expert evidence, I propose to discount Mr Viarella's assessment by 10 percent on account of this consideration.
48 Thirdly, the respondent submits that (a) an indirect effect of the cycleway public purpose was to facilitate a change in zoning to B4 Mixed Use of the non-acquired lands formerly zoned Open Space; (b) that meant that the value of the residue lands was increased by the carrying out the cycleway public purpose; (c) therefore there should be a discount for that increase under s 55(f) of the Just Terms Act. I have difficulty in seeing a sufficient causal connection in terms of s 55(f), which directs attention to the acquisition date. The change in zoning did not appear in the draft LEP that had been exhibited prior to the acquisition date. Not all of the lands then zoned Open Space were acquired for the cycleway public purpose. That strengthened the case for rezoning the non-acquired Open Space lands, as occurred soon after acquisition, in the 2007 LEP. It may be accepted that the public purpose was a contributing factor to the rezoning change which in turn increased the value of the rezoned lands. However, in my opinion, this does not mean that the increase in value was "by reason of" the carrying out of the cycleway public purpose within the meaning of s 55(f). The causal chain was insufficient, in my view, because it was still a discretionary matter, in light of the acquisition, for the council to decide whether or not to submit to the Director-General, who then had to report to the Minister, that the non-acquired Open Space lands should be rezoned in the LEP, and for the Minister to decide whether or not to effect such rezoning in the LEP 2007: ss 68(4) and 70 Environmental Planning and Assessment Act 1979. As Hodgson JA said in AMP Capital Investors Ltd v Transport Infrastructure Development Corporation [2008] NSWCA 325, (2008) 163 LGERA 245 at [99]: