The dispute between the parties has to be resolved by applying the customary law applicable to the parties, because section 5 of the which governs the parties provides that : "In questions regarding succession, special property of females, betrothal and marriage, divorce, dower, adoption, guardianship, minority, bastardy, family relations, wills, legacies, gifts, partition, or any religious usage or insti tution, the rule of decision shall be (a) any custom applicable to the parties concerned, which is not contrary to justice, equity or good conscience, and has not been by this or any other enactment altered or abolished, and has not been declared to be void by any competent authority 25 (b) The Muhammadan Law in cases where the parties are Muhammadans, and the Hindu Law, in cases where the parties are Hindus, except in so far as such "law has been altered or abolished by legislative enactment, or is opposed to the provisions of this Act, or has been modified by any such custom as is above referred to.