S. 171 : Partition – Assessment – Hindu undivided family – Provision that partial partitions after 31-12-78, not to be recognised for income tax and wealth tax purposes – Provision within legislative competence of Parliament – Not ultra vires charging section – Cut-off date not discriminatory. [Wealth-tax Act, 1957, S. 20A. Constitution of India, art. 14; Sch VII, List I, item 82]