Section 37A(6) in The Bengal Agricultural Debtors Act, 1936
(6)The Board shall in the case where any improvement has been effected bona fide by the decree-holder before the twentieth day of December, 1939, by the erection of a building whether of masonry, bricks, stone or any other material whatsoever or by the construction of any tank or well on the property sold or on any portion thereof, allow compensation to the decree-holder for any loss caused to him by the restoration of the possession of such property to the debtor and shall, before making an award under sub-section (5), determine the amount of such compensation in the manner prescribed.