10.4.3 General decision-making requirements of public law
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All council decision-makers are subject to public law principles which are enforced by the High Court in judicial review. They require public decision-makers to act lawfully, fairly and reasonably.
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The concept of acting lawfully includes:
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having the necessary power or delegation to make the decision
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acting in accordance with the purpose of the power being exercised, and within the scope of the discretion granted to the decision-maker
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taking into account all relevant considerations and ignoring any irrelevant considerations
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exercising independent judgement in making the decision rather than rubber-stamping the recommendation of another person.
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The concept of acting fairly includes:
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ensuring a proper process is followed, including consulting where appropriate
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being unbiased and free from conflicts of interest [1]
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fairly considering all relevant views put forward and not predetermining the decision [2]
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complying with the public’s legitimate expectations (e.g. keeping a promise to do something in a particular way that has been relied on)
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complying with any applicable principles of natural justice (although what this will require depends heavily on the context, as discussed below).
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The concept of acting reasonably includes:
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ensuring the decision is rational, based on legitimate reasons and one that a reasonable decision-maker could make
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ensuring the decision is proportionate to the purpose being served by the decision (the idea that a legal sledgehammer should not be used to crack a nut, especially if it affects human rights).
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These public law obligations vary by context; the exact obligations that apply depend on the nature of the decision [3].