While regulations tell you what the law is, compliance is the art of proving you have met those laws through testing and documentation. This category is highly practical, focusing on the technical files, Declaration of Conformity (DoC), and the actual testing procedures performed in the lab. We discuss how to choose a Notified Body, how to prepare for a safety audit, and how to maintain quality over the entire lifecycle of a product. It is the bridge between a theoretical design and a legally sellable product.