Section 76(4)(e) in The Bengal Irrigation Act, 1876
(e)No person entitled to use the water of any canal, or any work, building or land appertaining to any canal, shall sell or sublet or otherwise transfer his right to such use without the permission of the canal-officer, but all contracts made between Government and the owner or occupier of any immovable property, as to the supply of canal water to such property, shall be transferable therewith, and shall be presumed to have been so transferred whenever a transfer of such property takes place.