The various forms of action before the Court of Justice include:
Treaty infringement: Typically this action is instituted by the Commission against a Member State for failure to fulfill an obligation under the treaties or a regulation or directive.
Annulment: A Member State, the Council, Commission or the Parliament may ask the Court to annul all or part of an item of Union legislation. Individuals may also bring this type of action if the legislation directly affects them.
Failure to act: This type of action is brought against a Union institution for inaction when it is alleged that they are legally bound to act.
Appeals: The Court will take appeals on legal issues only from the General Court.
Preliminary rulings: As the highest authority on Union law, the Court of Justice will hear referrals from National Courts on interpretations of Union law. Once the Court has ruled on the matter, the National Court is bound to apply it to the case they are hearing.
The General Court has jurisdiction over the following actions:
Direct actions brought by individuals against acts of the institutions, bodies, offices or agencies of the European Union.
Actions brough by member states against the Commission.
Actions seeking compensation for damages.
Actions relating to Community trademarks.
When studying a judgment of the Court it is best to start with the opinion. The opinion most resembles an opinion from an American appellate court and will outline the facts and legal arguments. If the Court agrees with the Advocate General's resolution, the opinion can be used as authority. It the Court does not agree, its use as authority is obviously limited.