PART SEVEN OTHER SUBSTANTIVE PROVISIONS Article 26 Trade development PART EIGHT TRADE RELATIONS AMONG MEMBER STATES AND WITH THIRD COUNTRIES Article 27 Preferential trade arrangements Article 28 Most favoured nation treatment Article 29 Co-ordination of trade policies Article 30 Cooperation with third parties or groups of third countries PART NINE INSTITUTIONAL ARRANGEMENTS AND DISPUTE SETTLEMENT PROCEDURES Article 31 Institutional arrangements Article 32 Settlement of disputes Article 33 General undertaking Article 34 Amendment Article 35 Signature Article 36 Ratification Article 37 Entry into force Article 38 Accession Article 39 Depository