14. MFN Treatment: Non- discrimination between countries – the Most Favoured Nation principle is one of the most fundamental principles of the WTO. It requires member states to accord the most favourable tariff and regulatory treatment given to the product of any one member and/or non member at the time of export or import of “like products” to all other WTO members. Under the Most Favoured Nation rule, should WTO member state A agree in negotiation with state B, which needs not to be a WTO member, to reduce the tariff on the same product X to five percent, this same tariff rate must apply to all other WTO members as well. In other words, if a country gives favourable treatment to one country regarding a particular issue, it must handle all members equally regarding the same issue.