This document discusses the principles of evidence-based legislation. It argues that evidence-based policy making requires legislation that is grounded in scientific evidence and data. It outlines some of the tools, standards, and training needed to support evidence-based legislation, including legal informatics tools, global standards for knowledge representation, and developing digital skills among lawmakers. Examples provided include a legal interoperability lab project in Greece that uses authoring tools and data standards to pilot evidence-based approaches. The conclusion calls for investments in research services and cooperation to help smaller institutions implement evidence-based legislative approaches.