Promissory estoppel

--- Promissory estoppel --- Scope --- The principle of promissory estoppel restrains a public authority from resiling from a position that has been consciously adopted and acted upon by affected persons, unless an overriding public interest so demands and such departure is sanctioned by law --- Indeed, an authority which has the power to make an order ordinarily also possesses the power to rescind or modify it --- However, this principle is subject to a well-recognized exception: where an order has taken legal effect and, in pursuance thereof, certain rights have accrued in favour of an individual, such an order cannot be withdrawn or rescinded to the detriment of those vested rights.