Defendants: European Parliament (represented by: L. Visaggio and P. Schonard, acting as Agents), Council of the European Union (represented by: M. Simm and J. Herrmann, acting as Agents), and European Commission (represented initially by C. Cattabriga and F. Schatz, and subsequently by C. Cattabriga and S. Grünheid, acting as Agents)
Parties défenderesses: Parlement européen (représentants: L. Visaggio et P. Schonard, agents); Conseil de l’Union européenne (représentants: M. Simm et J. Herrmann, agents); et Commission européenne (représentants: initialement C. Cattabriga et F. Schatz, puis C. Cattabriga et S. Grünheid, agents)