S. 263 : Commissioner-Revision of orders prejudicial to revenue-Merger-Nationalised bank-CIT(A) has held that S. 115JB is not applicable to assessee-Revision is not valid-Deduction of bad debts-Order was passed after considering detailed submissions-Revision is not valid-Assessment made without reference to TPO-Revision order is valid. [S. 36(1)(vii), 36(1)(viia), 92CA, 115JB, 144C]