23 3. Upon receipt of the request, the Secretariat shall immediately circulate the request to all State Parties. 4. Where a State Party considers that it has a substantial interest (hereinafter referred to as the “State Party with substantial interest”) in the tariff schedule of the modifying State Party, it should communicate in writing, with supporting evidence, to the modifying State Party through the Secretariat within thirty (30) days. The Secretariat shall immediately circulate all such requests to all State Parties. 5. The modifying State Party and any State Party with substantial interest, as determined under paragraph 3, shall enter into negotiations to be coordinated by the Secretariat with a view to reaching an agreement on any necessary compensatory adjustment. In such negotiations and agreement, the State Parties shall maintain a general level of commitments not less favourable than the initial commitments. 6. The outcome of the negotiations and the subsequent modification of the tariff schedule and any compensation thereof, shall only be effected upon approval by State Parties with substantial interest and notification to the Secretariat which shall transmit to other State Parties. The compensatory adjustments shall be made in accordance with Article 4 of this Protocol. 7. The modifying State Party shall not modify its commitment until it has made compensatory adjustments as provided for in paragraph 6 and endorsed by the Council of Ministers. The outcome of the compensatory adjustment shall be notified to State Parties. Article 12 Elimination of Non-Tariff Barriers Except as may be provided for in this Protocol, the identification, categorisation, monitoring and elimination of Non-Tariff Barriers by State Parties shall be in accordance with the provisions of Annex 5 on Non-Tariff Barriers. Article 13 Rules of Origin Goods shall be eligible for preferential treatment under this Protocol, if they are originating in any of the State Parties in accordance with the criteria and conditions set out in Annex 2 on Rules of Origin, and in accordance with the Appendix to be developed on General and Product Specific Rules.