National treatment is a principle in international law vital to many treaty regimes. It essentially means treating foreigners and locals equally. Under national treatment, if a state grants a particular right, benefit or privilege to its own citizens, it must also grant those advantages to the citizens of other states while they are in that country. In the context of international agreements, a state must provide equal treatment to those citizens of other states that are participating in the agreement. Imported and locally produced goods should be treated equally — at least after the foreign goods have entered the market.