the border, it lies within the discretion of the Minister whether to direct a person be detained pending deportation. The Committee observes that such a decision, as well as any subsequent refusal by the Minister of a request for release, may be challenged in court by judicial review. Such judicial review proceedings may overturn a decision to detain (or to continue to detain) if manifestly unreasonable, or if relevant factors had not been considered, or if irrelevant factors had been considered, or if the decision was otherwise unlawful. The Committee notes that the Federal Court held, in its decision of 20 April 1999 on the author’s urgent application for interim relief pending hearing of his application of 29 March 1999 against the Minister’s decision not to release him, that there was a serious question to be tried as to whether the Minister had considered an irrelevant factor, but that in view of the imminent appeal to the Full Court in the deportation proceedings the balance of convenience was against release. et seq.), the Committee observes that the State party has failed to demonstrate that those reasons justify the author’s continued detention in the light of the passage of time and intervening circumstances. In particular, the State party has not demonstrated that, in the light of the author’s particular circumstances, there were not less invasive means of achieving the same ends, that is to say, compliance with the State party’s immigration policies, by, for example, the imposition of reporting obligations, sureties or other conditions which would take account of the author’s deteriorating condition. In these circumstances, whatever the reasons for the original detention, continuance of immigration detention for over two years without individual justification and without any chance of substantive judicial review was, in the Committee’s view, arbitrary and constituted a violation of article 9, paragraph 1. 8.3 As to the author’s further claim of a violation of article 9, paragraph 4, related to this period of detention, the Committee refers to its discussion of admissibility above and observes that the court review available to the author was confined purely to a formal assessment of the question whether the person in question was a “non-citizen” without an entry permit. The Committee observes that there was no discretion for a court, as indeed held by the Full Court itself in its judgement of 15 June 1994, to review the author’s detention in substantive terms for its continued justification. The Committee considers that an inability judicially to challenge a detention that was, or had become, contrary to article 9, paragraph 1, constitutes a violation of article 9, paragraph 4. 7.8 The Committee notes that the author has supplied no information whether he had (and if not, why he had not) pursued his review application of 29 March 1999 against the Minister’s decision, or accepted the Court’s invitation to reapply for relief after disposition of the Full Court appeal. Neither has the author explained his apparent failure to pursue review proceedings against the Minister’s decisions later on 15 October 1999 and in December 2000 not to release the author. In the circumstances, the author has failed to exhaust domestic remedies in respect of any issues arising in the second period of detention, and his claims under articles 7 and 9 relating to this period are inadmissible under article 5, paragraph 2 (b), of the Optional Protocol. 8.4 As to the author’s allegations that his first period of detention amounted to a breach of article 7, the Committee notes that the psychiatric evidence emerging from examinations of the author over an extended period, which was accepted by the State party’s courts and tribunals, was essentially unanimous that the author’s psychiatric illness developed as a result of the protracted period of immigration detention. The Committee notes that the State party was aware, at least from August 1992 when he was prescribed tranquillisers, of psychiatric difficulties the author faced. Indeed, by August 1993, it was evident that there was a conflict between the author’s continued detention and his sanity. Despite increasingly serious assessments of the author’s conditions in February and June 1994 (and a suicide attempt), it was only in August 1994 that the Minister exercised his exceptional power to release him from immigration detention on medical grounds (while legally he remained in detention). As subsequent events showed, by that point the author’s illness had reached such a level of severity that irreversible consequences were to follow. In the Committee’s view, the continued detention of the Consideration of the merits 8.1 The Human Rights Committee has considered the present communication in the light of all the information made available to it by the parties, as provided in article 5, paragraph 1, of the Optional Protocol. 8.2 As to the claims relating to the first period of detention, in terms of article 9, paragraph 1, the Committee recalls its jurisprudence that, in order to avoid a characterization of arbitrariness, detention should not continue beyond the period for which the State party can provide appropriate justification.69 In the present case, the author’s detention as a noncitizen without an entry permit continued, in mandatory terms, until he was removed or granted a permit. While the State party advances particular reasons to justify the individual detention (para. 4.28 69 A v. Australia, op. cit., at para. 9.4. 155