CHARNOVITZ: The Appellate Body's decision in the Tariff Preferences case demonstrates the value of a second-level review of panel decisions. Notwithstanding the composition of the panel – which was as highly qualified, balanced, and diverse as any panel could possibly be – the panel issued a decision that met widespread disapproval. In what is probably a record for third-party support of the plaintiff, eight countries asked the Appellate Body to reverse key points. Happily, the Appellate Body did reverse many of the troubling holdings in the panel report. Unhappily for the world community, the Appellate Body did not have an opportunity to review the panel's interpretation of GATT Article XX, which (like many previous panels) has chiseled away at vital exceptions.