The Most Favoured Nation (MFN) Clause under WTO regime is based on the

The Most Favoured Nation (MFN) Clause under WTO regime is based on the principle of

non-discrimination between nations
discrimination between nations
differential treatment between locals and foreigners
uniform tariff across commodities
This question was previously asked in
UPSC CDS-1 – 2017
The Most Favoured Nation (MFN) clause under the WTO regime is based on the principle of non-discrimination between nations.
The MFN principle means that if a country grants a trade concession or advantage to one trading partner (WTO member), it must grant the same treatment to all other WTO members. For example, if a country reduces its tariff on imports of cars from one member country, it must reduce the tariff on car imports from all other WTO members to the same level. This ensures that trade barriers are lowered uniformly for all members, fostering a level playing field.
This principle is enshrined in Article I of the General Agreement on Tariffs and Trade (GATT), which is a key part of the WTO agreements. While there are certain exceptions allowed (e.g., Regional Trade Agreements like Free Trade Areas or Customs Unions, and provisions for developing countries), the core principle of MFN is non-discrimination among members.