“15. What is legitimate expectation? Obviously, it is not a legal right. It is an expectation of a benefit, relief or remedy, that may ordinarily flow from a promise or established practice. The term 'established practice' refers to a regular, consistent predictable and certain conduct, process or activity of the decision-making authority. The expectation should be legitimate, that is, reasonable, logical and valid. Any expectation which is based on sporadic or casual or random acts, or which is unreasonable, illogical or invalid cannot be a legitimate expectation. Not being a right, it is not enforceable as such. It is a concept fashioned by courts, for judicial review of administrative action. It is procedural in character based on the requirement of a higher degree of fairness in administrative action, as a consequence of the promise made, or practice established. In short, a person can be said to have a 'legitimate expectation' of a particular treatment, if any representation or promise is made by an authority, either expressly or impliedly, or if the regular and consistent past practice of the authority gives room for such expectation in the normal course. As a ground for relief, the efficacy of the doctrine is rather weak as its slot is just above 'fairness in action' but far below 'promissory estoppel'. It may only entitle an expectant : (a) to an opportunity to show cause before the expectation is dashed; or (b) to an explanation as to the cause for denial. In appropriate cases, courts may grant a direction requiring the Authority to follow the promised procedure or established practice. A legitimate expectation, even when made out, does not always entitle the expectant to a relief. Public interest, change in policy, conduct of the expectant or any other valid or bonafide reason given by the decision-maker, may be sufficient to negative the 'legitimate expectation'. The doctrine of legitimate expectation based on established practice (as contrasted from legitimate expectation based on a promise), can be invoked only by someone who has dealings or transactions or negotiations with an authority, on which such established practice has a bearing, or by someone who has a recognized legal relationship with the authority. A total stranger unconnected with the authority or a person who had no previous dealings with the authority and who has not entered into any transaction or negotiations with the authority, cannot invoke the
