Article XIX. Deals with the question of colonies and territories which through the war have ceased to be under the old sovereignty. "Inhabited by peoples not yet able to stand by themselves ... there should be applied the principle that the well-being and development of such peoples form a sacred trust of civilization, and that securities for the performance of this trust should be embodied in the constitution of the League." The tutelage of such peoples, it was advised, should be intrusted to the advanced nations, and should be exercised by them as mandatories on behalf of the League. Communities that have reached a stage of development as in Turkey could be provisionally recognized as independent nations, subject to administrative advice and assistance by mandatory power until they were strong enough to stand alone. Article XX. In this the League promises to endeavor to secure and maintain fair conditions of labor for men, women, and children in all countries where their commercial and industrial relations extend, and agree to establish a permanent bureau of labor. Article XXI. Provision through the instrumentality of the League to secure and maintain freedom of transit and equitable treatment for the commerce of all states members of the League. Special arrangements with regard to the necessities of the regions devastated during the war. Article XXII. The high contracting parties agree to place under control of the League all international bureaus already established if the parties to such treaties consent. All such international bureaus in the future shall be placed under the League. Article XXIII. Every treaty or international engagement entered into by any member of the League shall be registered with the secretary general and published by him. No treaty or international engagement shall be binding until so registered. Article XXIV. The body of delegates shall have the right to advise the reconsideration by states members of the League of treaties which have become inapplicable, and of international conditions of which the continuance may endanger world peace. Article XXV. The high contracting parties agree to abrogate all obligations inconsistent with the terms of the covenant, and will not hereafter enter into any engagements inconsistent with those terms. Powers signatory hereto, or subsequently admitted to the League, who have undertaken any obligations inconsistent with the terms of this convenant shall take steps to secure release from such obligations. Article XXVI is concerned with amendments to the covenant. These are to take effect when ratified by the states whose representatives compose the executive council, and by three-fourths of the states whose representatives compose the body of delegates. At the conclusion of his reading of the draft of the constitution of the League, President Wilson said in part: