(1)On and from the commencement of the Hindu Succession (Amendment) Act, 2005, in a Joint Hindu family governed by the Mitakshara law, the daughter of a coparcener shall,—(a)by birth become a coparcener in her own right in the same manner as the son;(b)have the same rights in the coparcenary property as she would have had if she had been a son;(c)be subject to the same liabilities in respect of the said coparcenary property as that of a son,and any reference to a Hindu Mitakshara coparcener shall be deemed to include a reference to a daughter of a coparcener:Provided that nothing contained in this sub-section shall affect or invalidate any disposition or alienation including any partition or testamentary disposition of property which had taken place before the 20th day of December, 2004.