The Authority considers both international as well as national cooperation highly important. The Authority routinely participates in the work of different field-based working groups, networks and organisations.
Agency for the Cooperation of Energy Regulators (ACER)
a European Union Agency was created by the Third Energy Package to further progress the completion of the internal energy market both for electricity and natural gas. As an independent European structure which fosters cooperation among European energy regulators, ACER ensures that market integration and the harmonisation of regulatory frameworks are achieved within the framework of the EU’s energy policy objectives.
Council of European Energy Regulators (CEER)
was established for the cooperation of the independent energy regulators of Europe. It seeks to facilitate the creation of a single, competitive, efficient and sustainable EU internal energy market.

Energy Regulators Regional Association (ERRA)
is an inter-institutional non-profit organisation unified by the shared goal of its regulatory members – from Europe, Asia, Africa, Middle East, North and South America – to improve energy regulation. ERRA fosters and facilitates exchange of data, information and experience among its members, in order to support strengthening and improving regulatory framework around the world and to promote opportunities for capacity building through its training courses, webinars, workshops and networking through the annual Energy Investment and Regulation Conference. ERRA has played a vital role in accelerating energy reform and market development in Europe and Eurasia, and its story, from the establishment to the present day, offers important lessons on how to support progress toward self-reliance in energy regulation.
The ERRA website gives access to all important information on the Association: member regulators, training programs and podcasts, online tariff database, numerous issue papers and analytical documents of the ERRA committees and working group, and other useful resources of international organizations engaged in the energy sector worldwide through the online library. ERRA capacity building activities are open to both regulators and non-regulators.
Regional cooperation
The Estonian Competition Authority has very good relations and cooperation with colleagues from neighbouring countries. Often the undertakings are active in many neighbouring countries and authorities are facing similar challenges. Annual meetings take place with Latvian, Lithuanian and Finnish colleagues for discussing different regulatory issues.