S. 263 : Commissioner-Revision of orders prejudicial to revenue-Cash credits-Share capital-Share premium-Facts examined by Assessing Officer-Not a case of no enquiry or lack of enquiry 1Order is neither erroneous nor prejudicial to interests of revenue-Revision order is set aside-Revision jurisdiction cannot be exercised on same issue for second time. [S. 68, 133(6), 143(3)]