The Conference on the Limitation of Armament at Washington adopted at its sixth plenary session on the 4th February, 1922, a resolution for the appointment of a Commission representing the United States of America, the British Empire, France, Italy and Japan to consider the following questions:

(a) Do existing rules of international law adequately cover new methods of attack or defence resulting from the introduction or development, since The Hague Conference of 1907, of new agencies of warfare?

(b) If not so, what changes in the existing rules ought to be adopted in consequence thereof as a part of the law of nations?

Josephus Daniels, Ambassador Extraordinary and Plenipotentiary of the United States of America to the Government of Mexico, and Jose Manuel Puig Casauranc, Secretary for Foreign Affairs of the United Mexican States, duly authorized, have agreed on behalf of their two governments to conclude the following protocol: