law: The Indian Tramways Act, 1886
  16. Carriage of dangerous or offensive goods.-
  (1) A person shall not be entitled to carry or to require to be carried, on a tramway constructed under this Act, any goods of a dangerous or offensive nature.
  (2) A person taking such goods with him on the tramway shall, before entering the carriage, give notice of their nature to the servant of the promoter or lessee in charge of the carriage.
  (3) A person sending such goods by the tramway shall distinctly mark their nature on the outside of the package containing them, or otherwise give notice thereof in writing to the servant of the promoter or lessee with whom he leaves them for the purpose of their being sent by the tramway.
  (4) Any servant of the promoter or lessee may refuse to carry upon the tramway a parcel which he suspects to contain goods of a dangerous or offensive nature and, if any such parcel has been received for the purpose of being carried upon the tramway, may stop the transit thereof until he is satisfied as to the nature of its contents.
  (5) Where a servant of the promoter or lessee refuses under sub-section (4) to carry a parcel which has been received for the purpose of being carried upon the tramway, he shall, as soon as may be, give notice of his refusal to the consignor or consignee if he refuses at a time when neither of them is present.