S. 250: Appeal-Commissioner (Appeals)]-Procedure-Condonation of delay-Refusal to condonation of delay and decision on merits-Once the appeal is not admitted on account of delay, the CIT(A) cannot proceed to decide the issue on merit-When CIT(A) has decided the issue on merit despite the delay in filing the appeal, it is deemed or implied that the CIT(A) has condoned the delay in filing the appeal and admitted the appeal for adjudication. [S. 249(3), 251, 253]