This article discusses possible implications of early Joint Implementation (JI) action. Some projects which would otherwise be non-additional during the first commitment period, can become additional by implementing them before 2008 through early JI. For example, several environmental investments that will be mandatory under the European Union (EU) <italic>Acquis Communautaire</italic> as of, e.g. 2008 or 2010 could be carried out earlier than that with early JI action. As such, candidate countries could partly finance the accession process through JI credits and their environmental standards would earlier be in line with the <italic>Acquis</italic>. The theoretical risk that projects would have to follow a slow track if JI parties are not eligible for the fast track is not large for JI hosts that are candidate for EU membership.
