Case T-170/06: Judgment of the Court of First Instance of 11 July 2007 — Alrosa v Commission (Competition — Abuse of a dominant position — World market for the production and supply of rough diamonds — Decision making binding the commitments proposed by the undertaking in a dominant position — Article 9 of Regulation (EC) No 1/2003 — Principle of proportionality — Contractual freedom — Right to be heard)