This combines Article 16 of the Covenant and Article 11 of the Protocol. It omits much of the pending amendments to Article 16 of the Covenant as superfluous.
Should any Member of the League resort to war, in disregard of its covenants, it shall ipso facto be deemed to have committed an act of war against all other Members of the League, which hereby undertake immediately to subject it to the severance of all trade or financial relations and to prohibit all intercourse, at least between persons resident within their territories and persons resident within the territory of the covenant-breaking State, and, if they deem it expedient, also between their nationals and the nationals of the covenant-breaking State, and to prevent all financial, commercial or personal intercourse at least between persons resident within the territory of that State and persons resident within the territory of every other State, and, if they deem it expedient, also between the nationals of that State and the nationals of every other State.
It shall be the duty of the Council in such case to recommend to the several Governments concerned what effective military, naval or air force the Members of the League shall severally contribute to the armed forces to be used to protect the Covenants of the League.
As soon as the Council has called upon the Members of the League to apply sanctions, as provided in Article 15d, the obligations of the Members of the League in regard to the sanctions mentioned in paragraphs one and two of this Article will immediately become operative in order that such sanctions may forthwith be employed against the aggressor.
Those obligations shall be interpreted as obliging each Member of the League to co-operate loyally and effectively in support of the Covenant, and in resistance to any act of aggression, in the degree which its geographical position and its particular situation as regards armaments allow.
The Members of the League agree, further, that they will mutually support one another in the financial and economic measures which are taken under this Article, in order to minimise the loss and inconvenience resulting from the above measures, and that they will mutually support one another in resisting any special measures aimed at one of their number by the covenant-breaking State, and that they will take the necessary steps to afford passage through their territory to the forces of any of the Members of the League which are co-operating to protect the covenants of the League.
The Members of the League jointly and severally undertake to come to the assistance of the State attacked or threatened, and to give each other mutual support by means of facilities and reciprocal exchanges as regards the provision of raw materials and supplies of every kind, openings of credits, transport and transit, and for this purpose to take all measures in their power to preserve the safety of communications by land and by sea of the attacked or threatened State.
If both parties to the dispute when so invited refuse to accept of Article 15d, the economic and financial sanctions shall be applied to both of them.
Any Member of the League which has violated any covenant of the League may be declared to be no longer a Member of the League by a vote of the Council concurred in by the Representatives of all the other Members of the League represented thereon.