(2)Without prejudice to the generality of the foregoing sub-section, if the [Assessing Officer] [ Substituted by Act 4 of 1988, Section 2, for " Income-tax Officer" (w.e.f. 1.4.1988).] or the [* * *] [ Certain words omitted by Act 21 of 1998, Section 65 (w.e.f. 1.10.1998).] [Commissioner (Appeals)] [ Inserted by Act 29 of 1977, Section 29 (w.e.f. 10.7.1978).] in the course of any proceeding under this Act in respect of any such firm as is referred to in that sub-section is satisfied that the firm was guilty of any of the acts specified in Chapter XXI, he may impose or direct the imposition of a penalty in accordance with the provisions of that Chapter.