ABSTRACT

The determination of the proper law of contract under private international law is a fundamental aspect of cross-border contractual relationships. This study appraises the legal principles and mechanisms used to determine the law governing international contracts, focusing on the doctrinal evolution, choice of law rules, and judicial interpretation. It explores how courts and arbitral tribunals determine the applicable law in the absence of express choice by the parties, as well as the limitations on party autonomy in selecting the proper law.

The study begins by defining the concept of the “proper law of contract” in private international law as the system of law that governs the rights and obligations of the parties in a contractual agreement. It emphasizes the principle of party autonomy, which allows contracting parties to choose the law applicable to their agreement. This principle is upheld in most jurisdictions, provided the choice is bona fide and not contrary to public policy.

In situations where parties do not expressly choose a governing law, the study explores how courts determine the proper law through various mechanisms. The first step is often to identify an implied choice of law based on the terms of the contract and surrounding circumstances. In the absence of such an implied choice, courts may apply objective criteria to determine the law most closely connected to the contract. Factors considered include the place of performance, the location of the subject matter, and the domicile or place of business of the parties.

The study then examines the limitations on party autonomy, such as mandatory rules and overriding principles of public policy. These rules may restrict the parties’ freedom to select the proper law if the choice would violate fundamental legal principles in the forum state or adversely affect third-party rights. For instance, in consumer contracts, the Rome I Regulation (applicable in the European Union) limits the application of foreign laws that may undermine consumer protection rights.

The role of international conventions and instruments, such as the Hague Principles on Choice of Law in International Commercial Contracts and the Rome I Regulation, is also discussed. These frameworks harmonize choice of law rules across jurisdictions and provide clarity in determining the proper law of contract, particularly in international disputes.

In conclusion, the determination of the proper law of contract is a complex process governed by both party autonomy and objective criteria. While international conventions provide some harmonization, challenges remain in ensuring consistent application across jurisdictions. Continued refinement of choice of law principles is essential for reducing uncertainty in international contract disputes.

Keywords: proper law of contract, private international law, party autonomy, choice of law, public policy, international contracts, Rome I Regulation, Hague Principles.