Judgment of the Court (Second Chamber) of 3 March 2005 in Joined Cases C-21/03 and C-34/03 (reference for a preliminary ruling from the Conseil d'État): Fabricom SA v État belge (Public procurement — Works, supplies and services — Water, energy, transport and telecommunications sectors — Prohibition on participation in a procedure of submission of a tender by a person who has contributed to the development of the works, supplies or services concerned)