CAT/C/MEX/CO/7 (b) Ensure that the effectiveness of rehabilitation programmes for victims of torture is continuously monitored and evaluated and that data on the number of victims and their specific rehabilitation needs are collected; (c) Create commissions to assist victims in those federative entities that do not yet have one; ensure that the Executive Commission for Victim Support and the committees of the federative entities have adequately trained specialized personnel and the necessary material resources for their proper functioning; and consider expanding their existing services and benefits; (d) Collaborate with civil society organizations in the design and delivery of rehabilitation services; (e) Ensure that victims have a free choice of services between State and nonState service providers; (f) Ensure assistance to victims of torture through the implementation of immediate assistance measures and registration in the National Register of Victims. Detention of asylum seekers and undocumented migrants 48. The Committee notes with concern that the State party continues to rely on the automatic or mandatory detention of undocumented migrants and asylum seekers. Pursuant to section 111 of the Migration Act, the National Institute for Migration has a period of 15 working days to decide on the cases of persons staying in so-called migrant holding centres, extendable to 60 days in certain circumstances. However, in the event of an administrative or judicial appeal, including in relation to asylum applications, the law does not stipulate the maximum duration of administrative detention. Although the law does not provide for the detention of minors in these centres, except for unaccompanied minors, and only in exceptional circumstances, information before the Committee indicates that minors continue to be detained in migrant holding centres that are not equipped to meet their specific needs. The overcrowding and poor material conditions in migrant holding centres, as well as other deficiencies, notably regarding hygiene and food, are also a cause for concern. In this regard, the Committee notes that five migrant holding centres have been closed down and four others, as well as six temporary centres, are at present temporarily closed, having been deemed not to meet the minimum accommodation standards defined in a recommendation issued by the National Mechanism for the Prevention of Torture. According to the explanations provided by the delegation, the Mechanism can carry out monitoring visits to migrant holding centres at any time, while representatives of civil society organizations can gain entry subject to prior authorization. The Committee has received other reports of violence and abuse by immigration officials, including extortion, against persons detained in migrant holding centres and their families and friends (arts. 11 and 16). 49. The State party should: (a) Review its legislation with a view to repealing the provisions of the Migration Act that require the mandatory or automatic detention of undocumented migrants and asylum seekers; (b) Refrain from detaining undocumented migrants and asylum seekers for prolonged periods, use detention only as a measure of last resort and for the shortest period possible, and continue using non-custodial measures; (c) Establish a reasonable legal time limit for the administrative detention of undocumented migrants and asylum seekers who lodge administrative or judicial appeals; (d) Ensure that minors and families with minor children are not detained solely because of their status as undocumented migrants; (e) Ensure adequate living conditions in all migrant detention centres; (f) Ensure that persons held in such centres have access to effective complaint mechanisms; 14 GE.19-12617