20 PART II NON-DISCRIMINATION Article 4 Most-Favoured-Nation Treatment 1. State Parties shall accord Most-Favoured-Nation Treatment to one another in accordance with Article 18 of the Agreement. 2. Nothing in this Protocol shall prevent a State Party from concluding or maintaining preferential trade arrangements with Third Parties, provided that such trade arrangements do not impede or frustrate the objectives of this Protocol, and that any advantage, concession or privilege granted to a Third Party under such arrangements is extended to other State Parties on a reciprocal basis. 3. Nothing in this Protocol shall prevent two or more State Parties from extending to one another preferences which aim at achieving the objectives of this Protocol among themselves, provided that such preferences are extended to the other State Parties on a reciprocal basis. 4. Notwithstanding the provisions of paragraphs 2 and 3 of this Article, a State Party shall not be obliged to extend to another State Party, trade preferences extended to other State Parties or Third Parties before the entry into force of the Agreement. A State Party shall afford opportunity to the other State Parties to negotiate the preferences granted therein on a reciprocal basis, taking into account levels of development of State Parties. Article 5 National Treatment A State Party shall accord to products imported from other State Parties treatment no less favourable than that accorded to like domestic products of national origin, after the imported products have been cleared by customs. This treatment covers all measures affecting the sale and conditions for sale of such products in accordance with Article III of GATT 1994. Article 6 Special and Differential Treatment In conformity with the objective of the AfCFTA in ensuring comprehensive and mutually beneficial trade in goods, State Parties shall, provide flexibilities to other State Parties at different levels of economic development or that have individual specificities as recognised by other State Parties. These flexibilities