Studies conducted under the obligations of the customs union can be summarized as follows: for these reasons, critics have compared the Turkey-EU customs union agreement to the capitulations of the Ottoman Empire, in which traders from Western countries entering the Ottoman Empire were exempted from the application of local law, local taxation, local conscription and the search of their residence. • Community commercial policy and preferential trade agreements with third countries • Legislation to remove technical barriers to trade in industrial products • Competition • Industrial and intellectual property • Customs legislation. It is in the nature of a customs union that the interpretation of the common rules must be harmonised very strictly. Indeed, a weakness in the interpretation of the rules by one member of the customs union compared to others may very well lead to goods of the type in question transiting through the ports of the member which applies the lowest treatment and then diversifying throughout the customs union due to the absence of internal controls between the members of the customs union. Apparent inequalities in relations between Turkey and the EU under the customs union agreement led to a World Bank report. Its recommendations have not been implemented. Turkey is required to `adapt to the Common Customs Tariff` (Article 13(1)) and to “adapt its Customs Tariff whenever necessary to take account of changes in the Common Customs Tariff” (Article 13(2)). . . .