A/66/268 justice, and safeguarding their rights is therefore often difficult, even in States where there is a strong adherence to rule of law. 40 58. When a State fails to uphold the Standard Minimum Rules for the Treatment of Prisoners during a short period of time of solitary confinement, there may be some debate on whether the adverse effects amount to cruel, inhuman or degrading treatment or punishment or torture. However, the longer the duration of solitary confinement or the greater the uncertainty regarding the length of time, the greater the risk of serious and irreparable harm to the inmate that may constitute cruel, inhuman or degrading treatment or punishment or even torture. 59. The feeling of uncertainty when not informed of the length of solitary confinement exacerbates the pain and suffering of the individuals who are subjected to it. In some instances, individuals may be held indefinitely during pretrial detention, increasing the risk of other forms of cruel, inhuman or degrading treatment or punishment or torture (CAT/C/DNK/CO/5, para. 14). 60. Most studies fail to specify the length of time after which solitary confinement becomes prolonged. While the term may be undefined, detainees can be held in solitary confinement from a few weeks to many years. For example, in Kazakhstan, individuals can be held in solitary confinement for more than two months (A/HRC/13/39/Add.3, para. 117). Some detainees have been held in solitary confinement facilities for years, without any charge and without trial, and in secret detention centres where isolation is used as an integral part of interrogation practices. 41 In a joint report on the situation of detainees at Guantánamo Bay, experts found that although 30 days of isolation was the maximum period permissible, some detainees were returned to isolation after very short breaks over a period of up to 18 months (E/CN.4/2006/120, para. 53). 61. There is no international standard for the permitted maximum overall duration of solitary confinement. In A.B. v. Russia, the European Court of Human Rights held that detaining an individual in solitary confinement for three years constituted a violation of article 3 of the European Convention on Human Rights. 42 By contrast, in the United States of America, it is reported that two prisoners have been held in solitary confinement in a Louisiana prison for 40 years after failed attempts at judicial appeal of the conditions of their confinement. 43 As explained in paragraph 26 above, the Special Rapporteur finds that solitary confinement exceeding 15 days is prolonged. H. Psychological and physiological effects of solitary confinement 62. Negative health effects can occur after only a few days in solitary confinement, and the health risks rise with each additional day spent in such conditions. Experts who have examined the impact of solitary confinement have found three common elements that are inherently present in solitary confinement — __________________ 40 41 42 43 11-44570 Peter Scharff Smith, “Solitary Confinement: An introduction to the Istanbul Statement on the Use and Effects of Solitary Confinement”, p. 1. Shalev, op. cit., p. 2. A.B. v. Russia, Application No. 1439/06, European Court of Human Rights, para. 135 (2010). “USA: The Cruel and Inhumane Treatment of Albert Woodfox and Herman Wallace”, Amnesty International (2001). 17