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ULIS typically stands for "Uniform Law on International Sales," a legal framework established by the United Nations Commission on International Trade Law (UNCITRAL) to harmonize and facilitate international sales transactions. ULIS aims to provide uniform rules and principles governing the formation, performance, and enforcement of contracts for the international sale of goods, thereby promoting legal certainty, predictability, and efficiency in cross-border trade. Originally adopted in 1964, ULIS was intended to address the complexities and uncertainties arising from differences in national laws and legal systems governing international sales, which often hindered the smooth flow of commerce and led to costly disputes between parties from different jurisdictions. ULIS incorporates key principles of contract law, such as offer and acceptance, contract formation, contractual obligations, and remedies for breach, while also addressing specific issues relevant to international trade, such as choice of law, jurisdiction, and the rights and obligations of buyers and sellers in the absence of express contractual provisions. Although ULIS was eventually superseded by the United Nations Convention on Contracts for the International Sale of Goods (CISG), which was adopted in 1980 and has been ratified by a larger number of countries, its principles continue to influence the development of international sales law and serve as a valuable reference for practitioners, policymakers, and scholars seeking to navigate the complex legal landscape of cross-border commerce. ULIS remains an important milestone in the ongoing quest for harmonization and modernization of international trade law, reflecting the global community's commitment to promoting fair, efficient, and predictable commercial relations in an increasingly interconnected world.