A/66/268 86. States should abolish the use of solitary confinement for juveniles and persons with mental disabilities. Regarding disciplinary measures for juveniles, the Special Rapporteur recommends that States should take other measures that do not involve the use of solitary confinement. In regard to the use of solitary confinement for persons with mental disabilities, the Special Rapporteur emphasizes that physical segregation of such persons may be necessary in some cases for their own safety, but solitary confinement should be strictly prohibited. 87. Indefinite solitary confinement should be abolished. 88. It is clear that short-term solitary confinement can amount to torture or cruel, inhuman or degrading treatment or punishment; it can, however, be a legitimate device in other circumstances, provided that adequate safeguards are in place. In the opinion of the Special Rapporteur, prolonged solitary confinement, in excess of 15 days, should be subject to an absolute prohibition. 89. The Special Rapporteur reiterates that solitary confinement should be used only in very exceptional circumstances, as a last resort, for as short a time as possible. He emphasizes that when solitary confinement is used in exceptional circumstances, minimum procedural safeguards must be followed. These safeguards reduce the chances that the use of solitary confinement will be arbitrary or excessive, as in the case of prolonged or indefinite confinement. They are all the more important in circumstances of detention where due process protections are often limited, as in administrative immigration detention. Minimum procedural safeguards should be interpreted in a manner that provides the greatest possible protection of the rights of detained individuals. In this context, the Special Rapporteur urges States to apply the following guiding principles and procedural safeguards. Guiding principles 90. Throughout the period of detention, the physical conditions and prison regime of the solitary confinement, and in particular the duration of confinement, must be proportional to the severity of the criminal or disciplinary infraction for which solitary confinement is imposed. 91. The physical conditions and prison regime of solitary confinement must be imposed only as a last resort where less restrictive measures could not achieve the intended disciplinary goals. 92. Solitary confinement must never be imposed or allowed to continue except where there is an affirmative determination that it will not result in severe pain or suffering, whether physical or mental, giving rise to acts as defined in article 1 or article 16 of the Convention against Torture. 93. All assessments and decisions taken with respect to the imposition of solitary confinement must be clearly documented and readily available to the detained persons and their legal counsel. This includes the identity and title of the authority imposing solitary confinement, the source of his or her legal attributes to impose it, a statement of underlying justification for its imposition, its duration, the reasons for which solitary confinement is determined to be appropriate in accordance with the detained person’s mental and physical health, the reasons for which solitary confinement is determined to be 11-44570 23