S. 263 : Commissioner-Revision of orders prejudicial to revenue-All details were on record-Payment of remuneration to managing trustee of major philanthropic trust was accepted in earlier years-Investment in shares by assessee-trust had been accepted as part of corpus of trust for over four decades by department and CBDT had also accepted same while notifying assessee-trust under section 10(23C)-Revision is held to be not valid. [S. 10(23C), 11, 13(2)]