appropriate to their age and legal status insofar as conditions of detention are concerned, such as shorter working hours and contact with relatives, with the aim of furthering their reformation and rehabilitation. Article 10 does not indicate any limits of juvenile age. While this is to be determined by each State party in the light of relevant social, cultural and other conditions, the Committee is of the opinion that article 6, paragraph 5, suggests that all persons under the age of 18 should be treated as juveniles, at least in matters relating to criminal justice. States should give relevant information about the age groups of persons treated as juveniles. In that regard, States parties are invited to indicate whether they are applying the United Nations Standard Minimum Rules for the Administration of Juvenile Justice, known as the Beijing Rules (1987). 3