The EU-backed Energy Community Treaty, signed in 2005 and comprising the western Balkan countries, Ukraine and Moldova, has been widely hailed as encouraging regional co-operation. It also sets a legislative framework for the signatories (also known as the contracting parties) that should contribute, along with the EU accession process, to addressing the environmental and social impacts of the energy sector. Indeed, examples of the Energy Community's added value are its adoption of renewable energy targets in October 2012, as well as a requirement for power plants to comply with EU emissions limits.