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The study reviews and compares the sources of uniform substantive law on international sales and contracts, to give an overview of the methods elaborated to interpret them. Have uniform law instruments hammered out a common solution for their interpretation? They have gradually confronted with the problem of interpretation and developed the rules governing interpretation, moving away from the definition of the content of some specific legal concepts towards abstract principles of construction, such as the international character of the instrument. The most influential in this area has been the regulatory approach of the Vienna Sales Convention. However, there are still distinctions in relation to the possible role of private international law (conflict of laws), more precisely the role of the national law designated by private international law, in filling loopholes.

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United Nations Report of the United Nations Commission on International Trade Law Forty-fifth session (25 Ju–e - 6 July 2012) General Assembly Official Records Sixty-seventh session, Supplement No. 17 A/67/17 V.12-55154 33

Laws and Conventions

Convention relating to a Uniform Law on the International Sale of Goods (ULIS), signed at The Hague, on 1 July 1964

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UNIDROIT Principles of International Commercial Contracts, (Rome: UNIDROIT, 2016) (UPICC)

United Nations Convention on Contracts for the International Sale of Goods (CISG), signed at Vienna on 11 April 1980