Compulsory acquisition under s 13 of the Town Planning and Development Act 1928 (WA) must be consistent with the terms and effect of the relevant town planning scheme; land zoned for private use cannot be taken for a public purpose under that provision. The acquisition of land to avoid the obligation to construct railway crossings under s 102 of the Public Works Act is capable of being for a railway purpose within s 161 of the Land Act (majority view, Murray AJA dissenting). The administrative law doctrine of improper purpose only arises if, on the objective facts, the decision is capable of being within power — a mistake of fact cannot expand legislative power. The doctrine of approbation and reprobation does not prevent a challenge to the validity of a taking order where the advance compensation payment is liable to forfeiture if the taking order is invalid.
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