The notion of a "legitimate expectation" which gives rise to a prima facie entitlement to procedural fairness or natural justice in the exercise of statutory power or authority is well established in the law of this country (see, e.g., F.A.I. Insurances Ltd. v. Winneke [1] ). The notion is not, however, without its difficulty. For one thing, the word "legitimate" is prone to carry with it a suggestion of entitlement to the substance of the expectation whereas the true entitlement is to the observance of procedural fairness before the substance of the expectation is denied (see, e.g., Salemi v. MacKellar [No. 2] [2] ; Kioa v. West [3] ). In that regard, there is much to be said for preferring the phrase "reasonable expectation" which has often been used in judgments in this Court. For another thing, the vagueness of the phrase "legitimate expectation", which enables it to be used as a convenient label for a broad category of circumstances which will give rise to a prima facie obligation to accord procedural fairness, may convey an impression of comprehensiveness with the result that the absence of an identified legitimate expectation is wrongly seen as a legal mandate for disregarding procedural fairness in any case where no legal right in the strict sense is involved. Regardless of whether one can identify a right in the strict sense or a legitimate expectation, the requirements of procedural fairness must be observed in any case where, by reference to "the particular statutory framework" (see Mobil Oil Australia Pty. Ltd. v. Federal Commissioner of Taxation [4] ), it is proper to discern a legislative intent that the donee of governmental executive power or authority should be bound by them. There is a strong presumption of such a legislative intent in any case where a statute confers on one person a power or authority adversely and directly to affect the rights, interests, status or legitimate expectations of a real or artificial person or entity in an individual capacity (as distinct from merely as a member of a section of the general public). The rationale of that strong presumption is to be found not so much in sophisticated principle as in ordinary notions of what is fair and just. In that regard, it is important to bear in mind that the recognition of an obligation to observe procedural fairness does not call into play a body of rigid procedural rules which must be observed regardless of circumstances. Where the obligation exists, its precise content varies to reflect the common law's perception of what is necessary for procedural fairness in the circumstances of the particular case. In some cases where the requirements of procedural fairness are applicable, nothing less than a full and unbiased hearing of each affected individual's case will satisfy them. In other circumstances, something less may suffice. Thus, the circumstances of a particular case may be such that procedural fairness does not require that each person affected be accorded an effective opportunity of being personally heard before a decision is made but nonetheless requires that the decision-maker be, and appear to be, personally unbiased (see, e.g., Jackson, Natural Justice, 2nd ed. (1979), p. 100). Indeed, the law seems to me to be moving towards a conceptually more satisfying position where common law requirements of procedural fairness will, in the absence of a clear contrary legislative intent, be recognized as applying generally to governmental executive decision-making (cf. Halsbury's Laws of England, 4th ed. (1989), vol. 1(1), par. 85) and where the question whether the particular decision affects the rights, interests, status or legitimate expectations of a person in his or her individual capacity is relevant to the ascertainment of the practical content, if any, of those requirements in the circumstances of a particular case and of the standing of a particular individual to attack the validity of the particular decision in those circumstances.