Article 10 International Covenant on Civil and Political Rights (ICCPR)

1. All persons deprived of their liberty shall be treated with humanity and with respect for the inherent dignity of the human person.

2.

(a) Accused persons shall, save in exceptional circumstances, be segregated from convicted persons and shall be subject to separate treatment appropriate to their status as unconvicted persons;

(b) Accused juvenile persons shall be separated from adults and brought as speedily as possible for adjudication.

3. The penitentiary system shall comprise treatment of prisoners the essential aim of which shall be their reformation and social rehabilitation. Juvenile offenders shall be segregated from adults and be accorded treatment appropriate to their age and legal status.

See also: Article 9 ICCPR