Certain amount to be added to or deducted from contribution leviable from a person

The amount by which the total value of the plots included in the final scheme with all the buildings and works thereon allotted to a person falls short of or exceeds the total value of the original plots with all the buildings and works thereon of such person shall, as the case may be, be deducted from or added to the contributions leviable from such person, each of such plots being estimated at its market value on the date of the declaration of intention to make a scheme or the date of a notification under section 31 and without reference to improvements contemplated in the scheme other than improvements due to the alterations of its boundaries.