“Parties to the main proceedings 1. The parties to the main proceedings are those who are determined as such by the referring court or tribunal in accordance with national rules of procedure. 2. Where the referring court or tribunal informs the Court that a new party has been admitted to the main proceedings, when the proceedings before the Court are already pending, that party must accept the case as he finds it at the time when the Court was so informed. That party shall receive a copy of every procedural document already served on the interested persons referred to in Article 23 of the Statute. 3. As regards the representation and attendance of the parties to the main proceedings, the Court shall take account of the rules of procedure in force before the court or tribunal which made the reference. In the event of any doubt as to whether a person may under national law represent a party to the main proceedings, the Court may obtain information from the referring court or tribunal on the rules of procedure applicable.”
“Interpretation of this Act, and rules of construction for other Acts and documents. (1) In this Act, unless the context otherwise requires— “party”, in relation to any proceedings, includes any person who pursuant to or by virtue of rules of court or any other statutory provision has been served with notice of, or has intervened in, those proceedings;…”
“The parties to a judicial review claim will be the claimant, the defendant and interested parties…The courts also have power to allow any other person to file evidence or appear at a judicial review hearing.”