justice. These standards will, of course, be informed by the common law principles developed over decades… 197. The High Court in Republic v Fazul Mahamed & 3 Others exparte Okiya Omtatah Okoiti [2018] eKLR added its voice on the issue, and, as follows: 25. In John Wachiuri T/A Githakwa Graceland & Wandumbi Bar & 50 Others vs The County Government of Nyeri & Ano[39] the Court emphasized that there are three categories of public law wrongs which are commonly used in cases of this nature. These are: a. b. c. Illegality - Decision makers must understand the law that regulates them. If they fail to follow the law properly, their decision, action or failure to act will be "illegal". Thus, an action or decision may be illegal on the basis that the public body has no power to take that action or decision, or has acted beyond it powers. Fairness - Fairness demands that a public body should never act so unfairly that it amounts to abuse of power. This means that if there are express procedures laid down by legislation that it must follow in order to reach a decision, it must follow them and it must not be in breach of the rules of natural justice. The body must act impartially, there must be fair hearing before a decision is reached. Irrationality and proportionality - The Courts must intervene to quash a decision if they consider it to be demonstrably unreasonable as to constitute 'irrationality" or 'perversity' on the part of the decision maker. The benchmark decision on this principle of judicial review was made as long ago as 1948 in the celebrated decision of Lord Green in Associated Provincial Picture Houses Ltd vs Wednesbury Corporation: If decision on a competent matter is so unreasonable that no reasonable authority could ever have come to it, then the Courts can interfere...but to prove a case of that kind would require something overwhelming... Judgment – Nairobi High Court Constitutional Petitions No. E211 of 2022 & JR No. E071 OF 2022 Page 50 of 59

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