Section 24(2)(a) in Delhi Prisons (Transfer of Prisoner, Labour and Jail Industry, Food, Clothings and Sanitation) Rules, 1988
(a)When the prisoners escorted are aged, feeble, sick, crippled, women, children, or are accused of minor offences, or are not desperate characters, or are harmless lunatics, or where the number of persons including the escort does not exceed five, they may be conveyed in ordinary second class carriages. The escort shall sit on each side of the prisoners and guard the doors.