2. Notwithstanding any custom or usage to the contrary, in all questions (save questions relating to agricultural land) regarding intestate succession, special property of females, including personal property inherited or obtained under contract or gift or any other provision of Personal Law, marriage, dissolution of marriage, including talaq, ila, zihar, lian, khula and mubaraat, maintenance, dower, guardianship, gifts, trusts and trust properties, and waqfs (other than charities and charitable institutions and charitable and religious endowments) the rule of decision in cases where the parties are Muslims shall be the Muslim Personal Law (Shariat).