Questione giuridica chiave
Whether the Convention was invalid due to dol (fraud) based on alleged concealment of an intention to later denounce the Protocol.
Decisione estratta
No fraud was established; in light of the independent nature of the Convention and the parties' allocation of risk, the plaintiff had no duty to disclose any later intention to challenge the Protocol.
Motivazione estratta
A concealment amounts to fraud only where there is a duty to inform arising from law, contract, or good faith. The canton court found, on the text and purpose of the Convention, that the defendant accepted the risk that the Convention would remain binding regardless of the Protocol's fate.