Judgment of the Court of First Instance of 30 September 2003 in Case T-158/00 Arbeitsgemeinschaft der öffentlich-rechtlichen Rundfunkanstalten der Bundesrepublik Deutschland (ARD) v Commission of the European Communities (Competition — Concentrations — Admissibility — Pay-TV and digital interactive television services markets — Serious doubts as to compatibility with the common market — Commitments in the course of the first phase of examination — Time-limits — Modification of commitments — Insufficiency of commitments)