Community confer upon the Court of Justice shall be exercised, in accordance  with those Treaties, by a single Court of Justice composed and appointed as  provided in Articles 165 to 167 of the Treaty establishing the European  Economic Community and in Articles 137 to 139 of the Treaty establishing the  European Atomic Energy Community.

Article 4

1. Upon taking up its duties, the single Court of Justice referred to in Article 3  shall take the place of the Court provided for in Article 32 of the Treaty  establishing the European Coal and Steel Community. It shall exercise the  jurisdiction conferred upon that Court by that Treaty in accordance with the  provisions thereof.

The President of the single Court of Justice referred to in Article 3 shall  exercise the powers conferred by the Treaty establishing the European Coal and  Steel Community upon the President of the Court provided for in that Treaty.

2. To this end, on the date when the single Court of Justice referred to in Article 3

takes up its duties:

a. Article 32 of the Treaty establishing the European Coal and Steel  Community shall be repealed and the following provisions substituted  therefor':

`Article 32

The Court shall consist of seven Judges.

The Court shall sit in plenary session. It may however, form chambers ,each  consisting of three or five Judges, either to undertake certain preparatory  inquiries or to adjudicate on particular categories of cases in accordance  with rules laid down for these purposes.

Whenever the Court hears cases brought before it by a Member State or by  one of the institutions of the Community or has to give preliminary rulings  on questions submitted to it pursuant to Article 41, it shall sit in plenary  session.

Should the Court so request, the Council may, acting unanimously,  increase the number of Judges and make the necessary adjustments to  the second and third paragraphs of this Article and to the second

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