S. 264 :Commissioner-Revision of other orders-Property held for charitable purposes-Receipts from donors who deducted tax at source-No element of trade-Principle of consistency-No change in law or facts-Department cannot take different view without convincing reasons-Entitle to exemption-Rejection of revisional order was set aside. [S. 2(15) 11, 12,12A, 12AA, 13(8),80G, 194C, 194J, Art. 226]