Estonia becomes fifth ESA European Cooperating State ESA's Director of Legal Affairs and External Relations, Peter Hulsroj, and Estonian Minister of Economic Affairs and Communications, Juhan Parts, signed the Cooperation Agreement on 10 November in Tallinn. Estonia becomes the fifth European country to sign the European Cooperating State Agreement with ESA. The signed agreement strengthens Estonia's relations with ESA and defines the legal basis for developing a Plan for European Cooperating State (PECS) Charter, describing activities, projects and budget for Estonia's cooperation with ESA.