1. Contractual obligations, as to both form and substance, shall be governed by the law of the country expressly agreed upon by the parties. If they do not agree, the law of the country in which the contracting parties have their common domicile shall apply. If their domiciles differ, the law of the country where the main obligation of the contract is to be performed shall apply, unless it is clear from the circumstances that another law is intended to be applied. 2. Contracts concluded concerning immovable property shall be governed by the law of its location.
Interpretation and application must be checked against the official text and current version.