chair of local planning panel not appointed by Minister administering Environmental Planning and Assessment Act 1979 (NSW) as approved independent person
validity of decision of planning panel to refuse development consent upheld in light of s 52(1) of Interpretation Act 1987 (NSW)
no contrary intention in Environmental Planning and Assessment Act 1979 (NSW) to exclude application of s 52(1) of Interpretation Act 1987 (NSW) in circumstances of case