Agree with Dr. V K Singhania
The provision is section 45(5), and the recomputation is provided in section 45(5)(c)
[(5) Notwithstanding anything contained in sub-section (1), where the capital gain arises from the transfer of a capital asset, being a transfer by way of compulsory acquisition under any law, or a transfer the consideration for which was determined or approved by the Central Government or the Reserve Bank of India, and the compensation or the consideration for such transfer is enhanced or further enhanced by any court, Tribunal or other authority, the capital gain shall be dealt with in the following manner, namely :—
(a) the capital gain computed with reference to the compensation awarded in the first instance31 or, as the case may be, the consideration determined or approved in the first instance by the Central Government or the Reserve Bank of India shall be chargeable as 32[income under the head “Capital gains” of the previous year in which such compensation or part thereof, or such consideration or part thereof, was first received]; and
(b) the amount by which the compensation or consideration is enhanced or further enhanced by the court, Tribunal or other authority shall be deemed to be income chargeable under the head “Capital gains” of the previous year in which such amount is received by the assessee;
33[(c) where in the assessment for any year, the capital gain arising from the transfer of a capital asset is computed by taking the compensation or consideration referred to in clause (a) or, as the case may be, enhanced compensation or consideration referred to in clause (b), and subsequently such compensation or consideration is reduced by any court, Tribunal or other authority, such assessed capital gain of that year shall be recomputed by taking the compensation or consideration as so reduced by such court, Tribunal or other authority to be the full value of the consideration.]
Explanation.—For the purposes of this sub-section,—
(i) in relation to the amount referred to in clause (b), the cost of acquisition and the cost of improvement shall be taken to be nil;
(ii) the provisions of this sub-section shall apply also in a case where the transfer took place prior to the 1st day of April, 1988;
(iii) where by reason of the death of the person who made the transfer, or for any other reason, the enhanced compensation or consideration is received by any other person, the amount referred to in clause (b) shall be deemed to be the income, chargeable to tax under the head “Capital gains”, of such other person.]
The case you have referred to was in 1986, and the sub-section 3 was Inserted by the Finance Act, 2003, w.e.f. 1-4-2004. New amendments will have overriding effect on the previous judicial decisions. So take the Doctor's advise!