Indian Ports Act, 1908
5. Alteration of limits of ports
(1) The 2[Government] may, 10[***] subject to any rights of private property, alter the limits of any port in which this Act is in force.
11 [Explanation.- For the removal of doubts, it is hereby declared that the power conferred on the Government by this sub-section includes the power to alter the limits of any port by uniting with that port any other port or any part of any other port.]
(2) When the 2[Government] alters the limits of a port under sub-section (1), it shall declare or describe, by notification in the Official Gazette, and by such other means, if any, as it thinks fit, the precise extend of such limits.