Provided always, that in every case in which the Lord High Chancellor, Lord Keeper or Lords Commissioners for the custody of the Great Seal, or other the person or persons intrusted with the care and commitment of the custody of the persons and estates of persons found lunatic, idiot, and of unsound mind, or his Majesty’s High Court of Chancery, shall be the protector of a settlement, no document or instrument, as evidence of the consent of such protector to the disposition of a tenant in tail under such settlement, shall be requisite beyond the order in obedience to which the disposition shall have been made.