28 Article 27 Security Exceptions Nothing in this Protocol shall be construed to: (a) require any State Party to furnish any information the disclosure of which it considers contrary to its essential security interests; or (b) prevent any State Party from taking any action which it considers necessary for the protection of its essential security interests: (c) i. relating to fissionable materials or the materials from which they are derived; ii. relating to the traffic in arms, ammunition and implements of war and to such traffic in other goods and materials taking place either directly or indirectly for the purpose of supplying a military establishment; and iii. taken in time of war or other emergency in international relations; or prevent any State Party from taking any action in pursuance of its obligations under the United Nations Charter for the maintenance of international peace and security. Article 28 Balance of Payments 1. Where a State Party is in critical balance of payments difficulties, or under imminent threat thereof, or has the need to safeguard its external financial position difficulties and that has taken all reasonable steps to overcome the difficulties, may adopt appropriate restrictive measures in accordance with international rights and obligations of the State Party concerned, including those under the WTO Agreement, the Articles of Agreement of the International Monetary Fund and the African Development Bank respectively. Such measures shall be equitable, non-discriminatory, in good faith, of limited duration and may not go beyond what is necessary to remedy the balance of payments situation. 2. The State Party concerned, having adopted or maintained such measures shall inform the other State Parties forthwith and submit, as soon as possible, a time schedule for their removal.