of a detainee to be placed in this special centre, as well as for the behaviours that such a decision may cause. Furthermore, the procedures to be laid down should determine at least the member of the Police responsible for the decision to place or release a detainee from the special centre, the keeping of a detailed record regarding its use, the maximum period of detention, the detainees’ contact rights, medical monitoring during detention, the method of monitoring detainees, the provision of information to detainees on the decision to be placed in a special centre and possible objection to such decision on behalf of detainees. 5. With regard to the third category - Detainees who exhibit suicidal or self-harm thoughts - the Commissioner referred to the handbook prepared by her Office in collaboration with the Minister of Justice and Public Order entitled “Guiding Principles for Suicide Prevention in prisons and places of detention”. The aim of the handbook was to record the necessary procedures, practices and measures to be applied in all detention facilities on handling detainees at risk of suicide or self-harm. Therefore, the said Guiding Principles contain all the procedures which, according to the Commissioner, should be put in place for the assessment, monitoring and handling of these detainees. 6. Finally, with regard to the use of surveillance systems within the special centres for all the categories of detainees, the Commissioner referred to a consultation with the Commissioner for the Protection of Personal Data on the legal parameters of such measure, noting that in no case should the surveillance systems replace the presence and supervision by members of the Police, and the implementation of such measures is justified only provided that other less effective methods have been first exhausted while ensuring at all times their limited, controlled and safe implementation, necessary and proportionate to the intended purpose. With regard to the cooperation with the Police Stations, it is worth noting that the visit to the detention centre of the Kofinou Police Station (NPM 32