This document discusses extending a business architecture to include regulatory architecture using decisions and decision modeling notation (DMN). It describes how a financial services company built a regulatory decision architecture by identifying key decisions from regulations, modeling decision requirements, and establishing automation boundaries. This helped connect business architecture to regulations, simplify implementation of rules, and inject analytics into decision-making processes. Challenges included gaining skills in decision management and integrating technologies, but a decision-centric approach drove process simplification and improved decision-making.