extraordinary and equitable jurisdiction under Articles 226 and 32 respectively. That jurisdiction by its very nature is to be used sparingly and in circumstances where no other efficacious remedy is available. We have while discussing the relevant authorities earlier dealt in detail with the circumstances under which these extraordinary powers are used and are declined to be used by the courts. To accept Shri Jain's present contention would mean that the courts should disregard all these time-honoured and well-tested judicial self-restraints and norms and exercise their said powers, in every case before the detention order is executed. Secondly, as has been rightly pointed out by Shri Sibal for the appellants, as far as detention orders are concerned if in every case a detenu is permitted to challenge and seek the stay of the operation of the order before it is executed, the very purpose of the order and of the law under which it is made will be frustrated since such orders are in operation only for alimited period. Thirdly, and this is more important, it is not correct to say that the courts have no , power to entertain grievances against any detention order prior to its execution. The courts have the necessary power and they have used it in a proper cases as has been pointed out above, although such cases have been few and the grounds on which the courts have interfered with them at the pre-execution stage are necessarily very limited in scope and number, viz., where the courts are prima facie satisfied (i) that the impugned order is not passed under the Act under which it is purported to have been passed, (ii) that it is sought to be executed against a wrong person, (iii) that it is passed for a wrong purpose, (iv) that it is passed on vague, extraneous and irrelevant grounds or (v) that the authority which passed it had no