Question juridique clé
Whether the defendant was in default for the post-contract delay concerning the mutation plan and transfer date.
Solution extraite
No. The contract allowed performance after 31 August 1999 if the mutation plan and addendum were not yet available, so that date was not a fixed due date and no default arose without a notice of default.
Motifs extraits
Objectively interpreted, the contract postponed completion until the later signing of the mutation plan and notarial addendum. Since performance after 31 August 1999 remained contractually possible, the delay alone did not constitute a breach and no default under Art. 102 OR could be based solely on the missed date.