law: Indian Ports Act, 1908
  33. Levy of port-dues 
  (1) 37[Subject to the provisions of sub-section (2)],
  
  in each of the ports mentioned in the first schedule 14[other than a
  
  major port] such port-due, not exceeding the amount specified for the part in
  
  the third column of the schedule as the 2[Government] directs, shall
  
  be levied on vessels entering the port and described in the second column of
  
  the schedule, but riot oftener than the time fixed for the port in the fourth
  
  column of the schedule.
   37  [(2) The 2[Government] may, by notification in
  
  the Official Gazette, alter or add to any entry in the first schedule relating
  
  to ports 38[in 39[any State] or, as the case may be, in
  
  the State], and this power shall include the power to regroup any such ports.:
   40  [***]
   41  [(3)] Whenever the 2[Government] 42[***]
  
  declares any other port 14[other than a major port] to be subject to
  
  this Act it may, 42[***] by the same or any subsequent declaration
  
  further declare,- 
  (a) in the terms of any of the entries in the
  
  second column of the first schedule, the vessels which are to be chargeable
  
  with port-dues on entering the port.
  (b) the highest rates at which such dues may
  
  be levied in respect of vessels chargeable there with, and
  (c) the times at which such vessels are to be
  
  so chargeable.
   43  [***]
   41  [(4)] All port-dues now leviable in any port shall
  
  continue to be so leviable until it is otherwise declared in exercise of the
  
  powers conferred by this section.
   41  [(5)] An order increasing or imposing port-dues under this
  
  section shall not take effect till the expiration of sixty days from the day on
  
  which the order was published in the Official Gazette.