Section 17 in The Calcutta Hackney-Carriage Act, 1919
17. Plate to be affixed outside carriage. -
Upon the registration of any hackney-carriage, the Registering Officer shall cause to be affixed on some conspicuous part of the outside of such carriage a plate, bearing the class and the number of such carriage in the register and the number of passengers which it is licensed to carry.
