(4)The [Assessing Officer] [ Substituted by Act 4 of 1988, Section 2, for " Income-tax Officer" (w.e.f. 1.4.1988).] or the assessee, as the case may be, on receipt of notice that an appeal against the order of the [Deputy Commissioner (Appeals] [ Substituted by Act 4 of 1988, Section 2, for " Appellate Assistant Commissioner" (w.e.f. 1.4.1988).]) [or, as the case may be, the Commissioner (Appeals)] [ Inserted by Act 29 of 1977, Section 39 and Schedule V (w.e.f. 10.7.1978).] has been preferred under sub-section (1) or sub-section (2) by the other party, may, notwithstanding that he may not have appealed against such order or any part thereof; within thirty days of the receipt of the notice, file a memorandum of cross-objections, verified in the prescribed manner, against any part of the order of the [Deputy Commissioner (Appeals)] [ Substituted by Act 4 of 1988, Section 2, for " Appellate Assistant Commissioner" (w.e.f. 1.4.1988).] [or, as the case may be, the Commissioner (Appeals)] [ Inserted by Act 29 of 1977, Section 39 and Schedule V (w.e.f. 10.7.1978).] and such memorandum shall be disposed of by the Appellate Tribunal as if it were an appeal presented within the time specified in sub-section (3).