This book aims to create a user-friendly, accessible guide to the complex area of sanctions law. In particular, the book will examine how sanctions restrictions work in practice, and what the implications are for multinational businesses operating across numerous sanctions regimes. To this extent, the book considers the interrelationship between sanctions at the supranational and national levels, including the impact of the far-reaching US sanctions regime. The book's aim is not to provide an exhaustive list of sanctions regulations, but rather a framework for engaging with the relevant legislation and the main issues arising therefrom. Reinforcing this practical and commercially-focused approach, each chapter is written in a format that enables easy reading and rapid assimilation. Where there are relevant materials, be they legislative or case-law, these are outlined at the start of each chapter. In addition, the chapters dealing with challenges to sanctions designations each include a section with key principles, providing the clearest possible treatment of the subject.