in the Trust Territories, with increasing participation therein by :ndigenous elements of those Territories, or to develop on the same basis organs of that type already in existence ; that they should ensure that the nature and_ powers of these organs reflect the special status conferred on the Trust Territories by Chapter XII of fhe Charter and by the Trusteeship Agreements; and that they should hasten the attainment of the objectives set forth in Article 76 of the Charter,