Excess land not to be surrendered in certain cases.

Where a person representing a family holds land not exceeding the ceiling limit, but subsequently the land held exceeds the ceiling limit, then, notwithstanding anything contained in this Chapter, such person shall not be required to surrender any part of the land on the ground that it is excess land, if such excess is due to any improvements effected in the land by the efforts of the family or to a decrease in the number of its members.