[Assessment after partial partition of a Hindu undivided family.

20A. Where a partial partition has taken place after the 31st day of December, 1978, among the members of a Hindu undivided family hitherto assessed as undivided,—

(a)  such family shall continue to be liable to be assessed under this Act as if no such partial partition had taken place ;

(b)  each member or group of members of such family immediately before such partial partition and the family shall be jointly and severally liable for any tax, penalty, interest, fine or other sum payable under this Act by the family in respect of any period, whether before or after such partial partition ;

(c)  the several liability of any member or group of members aforesaid shall be computed according to the portion of the joint family property allotted to him or it at such partial partition,

and the provisions of this Act shall apply accordingly.

Explanation.—For the purposes of this section, "partial partition" shall have the meaning assigned to it in clause (b) of the Explanation to section 171 of the Income-tax Act.]