1. Notifications can be required pursuant to a formal legal instrument between authorities, such as an MOU or Framework of Cooperation at regional level such as that one with concluded with the peers in the Black Sea –Caspian Sea region.   The MOUs have notification clauses that provide that parties will notify each other on  past or current enforcement activities of common interest,  legislative acts concerning competition issues for improving the legal framework and the investigation procedures regarding infringements of the competition rules); Notifications may cover also mutual support in the elaboration of documentation and studies in the competition field and in participation at international activities, namely the ICN, OECD and UNCTAD. 2. Notifications can be required pursuant to informal cooperation (such as the RFI platform developed by the OECD Regional Centre for Competition headquartered in Budapest;  3. Notifications required pursuant to non-binding legal instruments (OECD and ICN instruments developed in the area of international cooperation - Section V of OECD Council Recommendation concerning international cooperation on competition investigations and proceedings, namely Notifications of Competition Investigations or Proceedings); Yet, RCC sent in 2018 copies of the authorization decision in its non-confidential version to the competition authorities of Moldova and FYR Macedonia who requested consultation in a merger case.