S. 263 : Commissioner-Revision of orders prejudicial to revenue-Repeal and savings Exemption was granted under Income-tax Act, 1922-Assessee must apply for registration under Income-tax Act 1962 to avail of exemption-Revision was held to be justified. [S. 11, 12, 12A, 12AA, 13, 297(2)(k), Indian Income-tax Act, 1922, S.4(3)(i)]