The Consolidated Versions of the Treaty on European Union and the Treaty on the Functioning of the Eu-ropean Union (the EU Treaties) set out the constitutional framework for the EU. The Treaties do not attempt to define sustainable development or impose an EU-wide adoption of a common definition. This practice note sets out the approach to sustainable development at the EU institutional level. This has an impact on all SDGs but in particular, SDGs 9, 10 and 13.