26 January 2013
ITAT cannot review its own order passed under section 254(1). However it can rectify a mistake apparent from record in its order passed under section 254(1) by passing a rectification order under section 254(2) .
27 January 2013
It means that kind of mistake on which two different views are not possible. Like for example, as per law depreciation to be allowed is 10% while ao allowed 5%. Here it is mistake apparent from record as nobody can express his view that depreciation should have been allowed at 5%. Ie those mistakes for which no investigation is required to be conducted.