Key legal question
Whether the contract required a new building application, not merely a plan-change request, to preserve the agreement
Extracted holding
The parties meant a building application that could actually lead to a building permit; a mere plan-change request did not satisfy the contractual deadline.
Extracted reasoning
Contract interpretation under Art. 18 OR showed the parties intended the buyer to act promptly and the clause’s purpose was to keep the project moving; third-party authority wishes could not alter the inter partes agreement.