(12)[ Where, in the assessment for any year commencing before the 1st day of April, 1988, the deduction under section 80-O in respect of any income, being the whole or any part of income by way of royalty, commission, fees or any similar payment as is referred to in that section, has not been allowed on the ground that such income has not been received in convertible foreign exchange in India, or having been received in convertible foreign exchange outside India, or having been converted into convertible foreign exchange outside India, has not been brought into India, by or on behalf of the assessee in accordance with any law for the time being in force for regulating payments and dealings in foreign exchange and subsequently such income or part thereof has been or is received in, or brought into, India in the manner aforesaid, the Assessing Officer shall amend the order of assessment so as to allow deduction under section 80-O in respect of such income or part thereof as is so received in, or brought into, India; and the provisions of section 154 shall, so far as may be, apply thereto, the period of four years specified in sub-section (7) of that section being reckoned from the end of the previous year in which such income is so received in, or brought into, India; so, however, that the period from the 1st day of April, 1988 to the 30th day of September, 1991, shall be excluded in computing the period of four years.] [ Inserted by Act 49 of 1991, Section 48 (w.e.f. 1.10.1991).]
