- 92 - a form setting out the rights of detainees to be systematically given to persons detained by the police at the outset of their custody; this form to be available in different languages; the person concerned to certify that he has been informed of his rights (paragraph 44); - a code of conduct for police interrogations to be drawn up (paragraph 46); - the possibility of introducing an electronic recording system for police interrogations to be explored, the system to be introduced to offer all appropriate guarantees (paragraph 47). comments - the recommendations made in relation to formal safeguards against the ill-treatment of persons detained by the police also apply to persons detained under the Aliens legislation (paragraph 50). requests for information - confirmation that once a detainee has been brought before the public prosecutor, the power of police to question him ceases (paragraph 48); - whether the rule against further questioning by the police covers questions about other matters falling outside the scope of the charges already laid against the detainee (paragraph 48); - whether the competent judicial authorities (in particular, public prosecutors) exercise on-thespot supervision of places of detention (paragraph 49); - information on the formal safeguards and practical arrangements which exist in order to ensure that aliens are not sent to a country where they run a risk of being subjected to torture or to inhuman or degrading treatment or punishment (paragraph 51). 4. Conditions of detention in police establishments a. police stations/headquarters i. Athens recommendations - as regards the detention facilities on the 7th floor of Athens Police Headquarters:  no-one to be held in those facilities for longer than is absolutely necessary;  a maximum occupancy level to be established of four persons per cell (with a possible exception as regards persons only staying a few hours in custody);