(1)In any action for the recovery of a penalty fare payable under section 54 of this Act it shall be for the plaintiff to show that any relevant exception provided by subsection (4) or (6) of that section does not apply.
(2)It shall be the duty of London Regional Transport to secure that the requirements of the following provisions of this section with respect to warning notices are met in the case of every bus or train service to which section 54 applies.
(3)In the case of a bus service, a warning notice meeting the requirements of subsection (4) below shall be posted in every vehicle used in providing that service or, where any such vehicle has more than one deck, on each deck of that vehicle, in such a position as to be readily visible to persons travelling on the vehicle.
(4)A warning notice posted in pursuance of subsection (3) above shall state—
(a)in the case of a bus service within section 54(2) of this Act, that persons travelling on that service who cannot produce a ticket showing payment of the correct fare for their journey, or for any part of their journey hot otherwise authorised, may be liable to a penalty fare; and
(b)in the case of a bus service within subsection (3) of that section, that persons who travel on that service without paying the correct fare for their journey, or for any part of their journey not otherwise authorised, may be liable to a penalty fare.
(5)In the case of a train service, a warning notice meeting the requirements of subsection (6) below shall be posted—
(a)in every station at which persons may start to travel on that service, in such a position as to be readily visible to prospective passengers ; and
(b)in every carriage of every train used in providing that service.
(6)A warning notice posted in pursuance of subsection (5) above shall state that persons travelling on that service who cannot produce a ticket showing payment of the correct fare for their journey, or for any part of their journey not otherwise authorised, may be liable to a penalty fare.
(7)Every warning notice posted in pursuance of this section shall state the amount of the current minimum penalty (within the meaning of section 54(7) of this Act) and indicate that a penalty fare may be higher.
(8)Any order under subsection (8) of that section shall be subject to annulment in pursuance of a resolution of either House of Parliament.