S. 263 : Commissioner-Revision of orders prejudicial to revenue-Carry forward and set-off of business losses-Set-off of brought forward losses against short term capital gains-Leasing business-As per section 72(1)(i) assessee is entitled to set-off brought forward business loss against income which has attributes of business income even though same is assessable to tax under head other than profits and gains from business-Revision order is not valid. [S. 72]