In the modern world, free trade policy is often implemented by a formal and reciprocal agreement between the nations concerned. However, a free trade policy may simply be the absence of trade restrictions. The central point is that even in a world without tariffs and other direct trade barriers, trade costs would be influenced by a series of regulatory measures. A tariff can make it more difficult to sell a product in a given market because it increases the price; A health standard or performance requirement, with complex technical requirements that involve high compliance costs, can make selling impossible. The second way of looking at free trade agreements as public goods is related to the growing trend that they are «deeper». The depth of a free trade agreement relates to the additional types of structural policies it covers. While older trade agreements are considered more «flat» because they cover fewer areas (for example. B tariffs and quotas), recent agreements cover a number of other areas, ranging from e-commerce services and data relocation. Since transactions between parties to a free trade agreement are relatively cheaper than those with non-parties, free trade agreements are considered excluded. Now that deep trade agreements will improve the harmonization of legislation and increase trade flows with non-parties, thereby reducing the exclusivity of free trade agreements, next-generation free trade agreements will take on essential characteristics for public goods.  The creation of free trade zones is seen as an exception to the nation`s most privileged principle (MFN) in the World Trade Organization (WTO), as the preferences that parties to a free trade area agree to each other go beyond their membership obligations.  Although GATT Article XXIV authorizes WTO members to establish free trade zones or to conclude interim agreements necessary for their establishment, there are several conditions relating to free trade zones or interim agreements leading to the creation of free trade zones. On the other hand, some local industries benefit.
They are finding new markets for their duty-free products.