This work investigates the complex legal distinction between substantive and procedural rules within the framework of private international law. Richard W. Garnett, a scholar in the field of conflict of laws, evaluates how courts determine the appropriate classification of legal issues when multiple jurisdictions are involved. The text provides a rigorous analysis of decisional law to clarify the criteria used by judges to categorize rules as either substantive or procedural, thereby influencing the outcome of cross-border litigation.

Legal scholars and practitioners frequently cite this work as a primary resource for understanding the nuances of characterization in private international law. Experts highlight the text for its detailed examination of case law and its utility in navigating complex jurisdictional disputes.