The document primarily discusses the legal obligation for companies and institutions in the Netherlands to implement energy-saving measures with a payback period of 5 years or less, as mandated by the Activities Decree on environmental management and, from January 1, 2024, the Environmental Activities Decision (Bal) and the Building Decisions Decision (Bbl) under the Environmental Law. It details the requirements for reporting on these measures every four years, the responsibilities of building owners and activity operators, and specific regulations for different types of businesses and buildings. The document also outlines exceptions to the energy-saving obligation, such as buildings solely powered by renewable energy, residential functions, and temporary structures. It provides a table for converting energy units and explains how to fulfill the obligation, including implementing all cost-effective measures or utilizing the Recognized Measures List (EML) system. Finally, it introduces the portfolio approach for large property owners.