Section 95(2)(a) in Delhi Motor Vehicles Rules, 1993
(a)In every public service vehicle other than a cab, there shall be provided , for a conductor seating space of 38 cm x 30 cm, for each passenger a reasonable comfortable seating space as specified below:(i)in the case if the vehicle having seats for two passengers on each side across the vehicle, seating space of not less than thirty-eight centimeters square measured on straight lines along at right angles to the front of each seat;(ii)in the case of vehicle having seats for two passengers on one side and three passengers on the other side across of the vehicle, a seating space of not less than thirty-eight centimeters square measured on straight lines along and at right angles to the front of each seat in case of seats for two passengers, and a seating space of not less than forty centimeters measured on straight lines along the seat and thirty-eight centimeters at right angles to the front of each seat (i.e depth of the seat) air the case of seats for three passengers; and(iii)when the seats placed alongside the vehicle, a seating space of not less than thirty-eight centimeters square measured on straight lines along and at right angles of the front of each set for two passengers, and a seating space of not less than forty centimeters measured on straight lines along the front of each seat (i.e. depth of the seat) in the case of seats for three passengers; and(aa)when the seats are placed along the vehicle, the backs of the sets on one side shall be at least one hundred and forty centimeters distant from the back of the seats on the other side,(bb)when the seats are placed across the vehicle and are facing in the same direction, there shall be every where a clear space of not less than sixty-five centimeters between the back of the seats; and(cc)when the seats are placed across the vehicle and are facing each other, there shall be every where a clear space of not less than one hundred and thirty-five centimeters between the backs of facing seats: