Section 120(1) in The Bihar Motor Vehicles Rules, 1992
(1)Not more than 25 kilograms of luggage or personal effects per occupant may be carried in a private service, vehicle:Provided that, if the conditions of the permit so provide, such vehicle may, in addition, carry the personal or household effect of such permit or office articles of such holder subject to the condition that the total weight of luggage or personal or household effect or office articles and persons does not exceed the permissible carrying capacity of the vehicle.