as to the nature of the steps to be taken to give effect to the financial and economic sanctions and measures of co-operation contemplated in Article 16 of the Covenant and in Article 11 of this Protocol.
When in possession of this information, the Council shall draw up through its competent organs:
1. Plans of action for the application of the economic and financial sanctions against an aggressor State;
2. Plans of economic and financial co-operation between a State attacked and the different States assisting it;
and shall communicate these plans to the Members of the League and to the other signatory States.
ARTICLE 13.
In view of the contingent military, naval and air sanctions provided for by Article 16 of the Covenant and by Article 11 of the present Protocol, the Council shall be entitled to receive undertakings from States determining in advance the military, naval and air forces which they would be able to bring into action immediately to ensure the fulfilment of the obligations in regard to sanctions which result from the Covenant and the present Protocol.
Furthermore, as soon as the Council has called upon the signatory States to apply sanctions, as provided in the last paragraph of Article 10 above, the said States may, in accordance with any agreements which they may previously have concluded, bring to the assistance of a particular State, which is the victim of aggression, their military, naval and air forces.
The agreements mentioned in the preceding paragraph shall be registered and published by the Secretariat of the League of Nations. They shall remain open to all States Members of the League which may desire to accede thereto.