In order to establish a single market made up of the member states of the European Union, a number of directives on VAT has been enacted since 1967, with the obligation for states to adapt their domestic legislation. The rules relating to the scope, the tax base, the payment, the territoriality of goods and services as well as reporting requirements are partially harmonized, but states can apply transitional arrangements in respect of rates, exemptions and rights of deduction, whose rules are being harmonized.