-29 In practice, concrete security and safety measures may entail inter alia: an individualised assessment of the risks and needs of each prisoners soon after their admission and the classification of prisoners, the adoption of security regimes and protective measures for the safety of prisoners, prison staff and others working in or visiting prisons as well as the use of restraints, force and other means of coercion. The following section contains a brief overview of each of these measures. 3.2.1.1. Risk assessment, individual needs and classification Authorities should conduct an individualised risk and needs assessment soon after the admission of each prisoner. Prisoner assessments should, however, never be based solely on safety and security risks. They must always also encompass an assessment of the prisoner’s needs, giving due consideration to all the activities that a prisoner should be able to engage in during their sentence, including rehabilitation programmes. Such an assessment should be reviewed at regular intervals and modified as necessary. These assessments will ensure that each prisoner is held in security conditions appropriate to the individual levels of risk.32 Certain prisoners are in a particular situation of vulnerability in detention, such as persons with intellectual and psychosocial impairments, young as well as elderly detainees, foreign prisoners and others faced with difficulties in terms of communication, prisoners belonging to an ethnic minority or an indigenous group and LGBTIQ prisoners (see also in this series, the Handbook on Prisoners in a Situation of Vulnerability). It is thus especially important that persons in a situation of vulnerability are identified and their individual needs assessed by qualified staff. To this end, different categories of prisoners shall be kept in separate institutions or parts of institutions, taking into account their sex, age, criminal record, the legal reason for their detention and the necessities of their treatment.33 3.2.1.2. Security or safety procedures as well as special high security regimes and protective measures If the prisoner poses a particular threat to security a special high security 32. EPR, Rules 16 and 51; see Mandela Rules, Rules 2, 4(2), 89, 93, 94; see also CPT, ‘Report on the visit to Cyprus’ (2018) CPT/Inf (2018) 16. 33. EPR Rule 17; Mandela Rules 11, 89, 93, 94. Monitoring Prison Violence