S. 263 : Commissioner-Revision of orders prejudicial to revenue-No lack of enquiry-Survey-Income surrendered-Business income-Assessment was finalised after considering the reply of the assessee-Revision order on the basis of surrendered income to be assessed under section 68 @ 60 per.cent as per section. 115BBE is quashed and set aside. [S. 68, 115BBE, 133A, 142(1), 143(2), 143(3)]