(mm)[ the circumstances in which, the conditions subject to which and the manner in which, the ] [Inserted by Act 16 of 1972, Section 41 (w.r.e.f. 1.4.1972).][* * *] [ Omitted by Act 21 of 1998, Section 65 (w.e.f. 1.10.1998).] [Commissioner (Appeals)] [ Inserted by Act 29 of 1977, Section 39 and Schedule V (w.e.f. 10.7.1978).][may permit an appellant to produce evidence which he did not produce or which he was not allowed to produce before the ] [Inserted by Act 16 of 1972, Section 41 (w.r.e.f. 1.4.1972).][Assessing Officer] [ Substituted by Act 4 of 1988, Section 2, for " Income-tax Officer" (w.e.f. 1.4.1988).];]