It's completely free until you have a dispute. Just copy and paste into your contracts.
This agreement shall be governed by and will be construed in accordance with English Law. The Parties agree to refer all disputes and differences of any kind (including any dispute regarding the existence of this agreement) to the Ajuve Dispute Resolution Rules which shall be read and construed as if set out in full herein. A full copy of those rules is available at http://ajuve.com/dispute-resolution-rules