In any case in which, under the laws of the Commonwealth, a provision is made for commutation in money of a life estate when all the parties interested are under no disability, such provision shall also apply when any of the parties interested are under disability. Where any of the parties interested are under disability, the court may, upon application of the guardian, conservator, committee, or trustee, if any, and, if not, by a guardian ad litem appointed by the clerk or judge of said court, of any such person, on behalf of his ward, and upon hearing evidence satisfactory to such court or judge, enter an order authorizing such guardian, conservator, committee, trustee, or guardian ad litem to consent on behalf of such person under disability to such commutation. Such consent shall be as valid and effective as if the person on whose behalf it was given were sui juris and had given such consent. All judicial orders and decrees entered prior to July 1, 1960, authorizing any such commutation where persons under disability were interested, are hereby validated and confirmed, provided that nothing in this section shall be construed as intended to impair any vested right.