Section 16A(1) in The Bengal Tanks Improvement Act, 1939
(1)When the possession of any tank has been taken under section 5 or section 6, the Collector shall determine in the prescribed manner the maximum area of land to the limits of which irrigation from the said tank may practicably be extended (hereinafter referred to as the maximum irrigation area) and the system and alignment by which and the priority ill accordance with which such irrigation can be so extended to the land in that area, and shall publish a notice in the prescribed form and manner defining the limits of the maximum irrigation area specifying the system, alignment and priority so determined.