S. 153C : Assessment-Income of any other person-Search and Seizure—Issue of notice is mandatory-The amendment in S.153C by the Finance Act, 2017, with effect from April 1, 2017 to the effect that the block period for the person in respect of whom the search was conducted as well as the “other person” would be the same six assessment years immediately preceding the year of search was prospective in nature-Order is held to be bad in law. [S.132, 153B(1)(b)]