Rule 1: Application of Rules
(1) These Rules shall apply to any arbitration proceeding conducted pursuant to the ICSID Additional Facility Rules.
(2) The parties may agree to modify the application of any of these Rules other than Rules 1-9.
(3) If any of these Rules, or any agreement pursuant to paragraph (2), conflicts with a provision of the law applicable to the arbitration from which the parties cannot derogate, that provision shall prevail.
(4) The applicable ICSID Additional Facility Arbitration Rules are those in force on the date of filing the request for arbitration, unless the parties agree otherwise.