This document discusses sources of law in the UK and how to understand regulations. It explains that there are two main types of law: criminal law and civil law. It also discusses how legislation is created through Acts of Parliament and secondary legislation. The document then focuses on European Union sources of law like regulations, directives, and decisions. It provides examples of online resources for finding legislation and regulations. Finally, it explains how to read a specific EU regulation on fluorinated greenhouse gases, including important elements like recitals and articles.