A/HRC/4/40/Add.3 page 12 (c) Light imprisonment, namely, deprivation of liberty for periods of between 10 days and 2 years. Persons sentenced to light imprisonment may work within the facility but are not obliged to do so. 44. Enforcement of the penalty does not mean that the convicted person is unable to exercise the rights and prerogatives granted by the Constitution and international treaties. Sentences are enforced by enforcement judges (Code of Criminal Procedure, art. 403). Time spent in pretrial custody and under house arrest counts against the sentence handed down (Code of Criminal Procedure, art. 410). 45. The delegation learned that, at the time of its visit, the country’s prison population amounted to 5,758 convicts. Of these, 1,030 were in pretrial custody and 4,728 were serving sentences; 93 per cent were men and 7 per cent women. Most were first-time offenders. 46. The director of the Nicaraguan prison system informed the delegation that 49.77 per cent of the prison population was aged between 35 and 50; 1.04 per cent were teenagers between the ages of 15 and 18 and 0.28 per cent were aged over 70. In all, 29 per cent had been charged with offences against life and personal integrity and safety; 25 per cent with offences against health (primarily offences involving the sale and use of narcotics and psychotropic substances); and 18 per cent for sexual offences. A total of 55.24 per cent were serving prison sentences longer than three months. 47. Convicts are housed in different cell blocks in accordance with their category: rehabilitation and pretrial detention; labour regime; open regime; semi-open regime; and women. Prisoners in the open regime are entitled to make home visits from the detention facility for periods of between three and six days. Some prisoners complained to the delegation that the period of time that they had spent in police cells had not been taken into consideration when determining their category. 48. The delegation confirmed, in some of the facilities, the existence of prison inmate committees. These are intended to improve the detention conditions and usually work together with the prison authorities on these matters. 49. The delegation visited Tipitapa prison headquarters, the main custodial establishment in the country. Although the prison has capacity for 1,802 prisoners, at the time of the visit there were 1,932 prisoners held inside it. Of these, 18.21 per cent were being held in pretrial custody. They included 107 aliens, most of whom were Hondurans (64), Colombians (31) and Guatemalans (30). In all, 51 per cent of the prisoners worked inside the facility. Some prisoners who were suffering from chronic illnesses were housed in a separate cell block, known as “Galeria No. 7”. 50. When it visited Estelí prison, the delegation found that it housed 634 inmates, 585 of whom were men and 49 women. The prison’s capacity, however, is only for 406 inmates. Six of the women were being held in pretrial custody and 43 were serving sentences.