Article 131, Article 146(1)(b) and Articles 147 and 273 of Council Directive 2006/112/EC must be interpreted as precluding national legislation under which, in the context of a supply of goods for export to be carried in the personal luggage of travellers, the vendor, a taxable person, must have attained a minimum level of turnover in the preceding tax year, or have concluded an agreement with a person authorised to refund VAT to travellers, where the mere failure to meet those conditions results in the definitive loss for the vendor of the exemption in relation to that supply.