The question of whether the assessed AV was reasonable and fair was the standard adopted in HSBC (HC) (upheld on appeal in HSBC Institutional Trust Services (Singapore) Ltd (trustee of Capitaland Mall Trust) v Chief Assessor [2020] 1 SLR 621), in respect of, inter alia, AV as defined under s 2(1) of the PTA (at [131], [136], [152] and [165]). I note however that in City Developments Ltd v Chief Assessor [2008] 4 SLR(R) 150 (“City Developments”), where the appellant argued that the Chief Assessor had: (a) acted unfairly in exercising his discretion under s 2(3)(b) of the PTA; and (b) acted ultra vires in having regard to wider planning considerations in determining AV, the Court of Appeal stated that “this being, in essence, a case of administrative law, there were effectively only two ways in which [the appellant] could challenge the Chief Assessor’s exercise of discretion under s 2(3) of the Act, viz, that the Chief Assessor had either acted illegally, or he had acted irrationally, in adopting the policy of discouraging land hoarding” (at [9]).