The Commissioner represents the internal disciplinary system of the league. The Commissioner's disciplinary power is conferred through the "best interest" clauses of the respective league regulations. At his sole discretion, the Commissioner has broad power to investigate any conduct or activity deemed "not in the best interest" of the sport. The Commissioner may also impose sanctions upon finding any owner, player, or other persons involved in the sport guilty of such conduct. In fact, the Commissioner is vested with investigative, prosecutorial, and adjudicative powers. Thus, the clause is a powerful tool which "can be used to justify nearly any action taken by the Commissioner."