Section 114(iv) in The Indian Succession Act, 1925
(iv)A fund is bequeathed to trustees for the benefit of the testator’s daughters, with a direction that, if any of them marry under age, her share of the fund shall be settled so as to devolve after her death upon such of her children as shall attain the age of 18. Any daughter of the testator to whom the direction applies must be in existence at his decease, and any portion of the fund which may eventually be settled as directed must vest not later than 18 years from the death of the daughters whose share it was. All these provisions are valid.