Questione giuridica chiave
Whether the tax-assumption clause formed part of the sale price under the 1991 agreement
Decisione estratta
The tax-assumption undertaking was an accessory obligation and not part of the purchase price.
Motivazione estratta
The cantonal court’s factual finding on the parties’ true intent bound the Federal Court; alternatively, the wording and context did not support an obligation to pay a theoretical tax amount immediately.