Given the growing importance of services trade to TPP Parties, the 12 countries share an interest in liberalized trade in this area. TPP includes core obligations found in the WTO and other trade agreements: national treatment; most-favoured nation treatment; market access, which provides that no TPP country may impose quantitative restrictions on the supply of services (e.g., a limit on the number of suppliers or number of transactions) or require a specific type of legal entity or joint venture; and local presence, which means that no country may require a supplier from another country to establish an office or affiliate, or to be resident, in its territory in order to supply a service. TPP Parties accept these obligations on a “negative-list basis,” meaning that their markets are fully open to services suppliers from TPP countries, except where they have taken an exception (non-conforming measure) in one of two country-specific annexes attached to the Agreement : (1) current measures on which a Party accepts an obligation not to make its measures more restrictive in the future, and to bind any future liberalisation, and (2) sectors and policies on which a country retains full discretion in the future.