(a) the predecessor shall be assessed in respect of the income of the previous year in which the succession took place up to the date of succession;

(b) the successor shall be assessed in respect of the income of the previous year after the date of succession.

(2)  Notwithstanding anything contained in sub-section (1), when the predecessor cannot be found, the assessment of the income of the previous year in which the succession took place up to the date of succession and of the previous year preceding that year shall be made on the successor in like manner and to the same extent as it would have been made on the predecessor, and all the provisions of this Act shall, so far as may be, apply accordingly.

(3)  When any sum payable under this section in respect of the income of such business or profession for the previous year in which the succession took place up to the date of succession or for the previous year preceding that year, assessed on the predecessor, cannot be recovered from him, the Assessing Officer shall record a finding to that effect and the sum payable by the predecessor shall thereafter be payable by and recoverable from the successor, and the successor shall be entitled to recover from the predecessor any sum so paid.

(4)  Where any business or profession carried on by a Hindu undivided family is succeeded to, and simultaneously with the succession or after the succession there has been a partition of the joint family property between the members or groups of members, the tax due in respect of the income of the business or profession succeeded to, up to the date of succession, shall be assessed and recovered in the manner provided in section 171, but without prejudice to the provisions of this section.

Explanation.—For the purposes of this section, "income" includes any gain accruing from the transfer, in any manner whatsoever, of the business or profession as a result of the succession.