Section 40(2)(a) in The Juvenile Justice (Care And Protection Of Children) Rules, 2007
(a)Observation home -(i)Separate observation homes for girls and boys;(ii)Classification and segregation of juveniles according to their age group preferably 7-11 years, 12-16 years and 16-18 years, giving due consideration to physical and mental status and the nature of the offence committed.