intervals of thirty days (or during a period of public emergency one hundred and eighty days) from the date on which his case was last reviewed; (c) at the hearing of his case by the tribunal he shall be permitted to appear in person or at his own expense by a legal representative of his own choice; and (d) if the tribunal orders, either because he satisfies the tribunal that new circumstances have arisen or because the tribunal considers it to be desirable, that his case should be submitted to the tribunal for review before the expiration of thirty days (or during a period of public emergency one hundred and eighty days) from the previous review, the case shall be submitted for review when so ordered by the tribunal. (2) On any such review, the tribunal may make recommendations concerning the necessity or expedience of continuing the detention to the authority by which it was ordered and that authority shall be obliged to act in accordance with any such recommendation unless, during a period of public emergency, the President otherwise directs; and where the President so directs, the authority shall cause to be published in the Gazette a notice that he has so directed. (3) A person who has been detained under any law providing for preventive detention and who has been released from detention in consequence of a report of a tribunal established under subparagraph (4) that there is, in its opinion, insufficient cause for his detention shall not again be detained by virtue of such law within the period of one hundred and eighty days from his release on the same grounds as those on which he was originally detained. (4) A tribunal for the purposes of this paragraph shall be established by law and shall consist of— (a) a chairman, who shall be a person who is or has been a judge of the Supreme Court or the High Court or is qualified under section 82 to be appointed as such; and (b) two other persons, one of whom— (i) is or has been a judge of the Supreme Court or the High Court or is qualified under section 82 to be appointed as such; (ii) has been a magistrate in Zimbabwe for not less than seven years; or (iii) is and has been for not less than seven years, whether continuously or not, qualified to practise as a legal practitioner in Zimbabwe. [Subparagraph as amended by sections 11 and 13 of Act 25 of 1981 - Amendment No. 2] (4a) In computing, for the purposes of subparagraph (4)(b)(iii), the period during which any person has been qualified to practise as a legal practitioner in Zimbabwe, any period during which he was qualified to practise as an advocate or attorney in Zimbabwe shall be included. [Subparagraph as inserted by section 11 of Act 25 of 1981 - Amendment No. 2] (5) No law providing for preventive detention during a period when a resolution under section 31J(6) is in effect shall authorize the detention of a person for a period longer than fourteen days unless the Minister designated for the purpose has issued an order providing for the preventive detention of that person. [Subparagraph as amended by section 20 of Act 23 of 1987 - Amendment No. 7] (6) The reference in subparagraph (1)(b) to a period of fourteen or thirty days in relation to a first review includes a reference to any lesser periods that amount in the aggregate to fourteen or thirty days respectively: -8-