Within three months after the request for arbitration has been received by both competent authorities, the competent authorities shall agree on the questions to be resolved by the arbitration panel and communicate them in writing to the person who made the request for arbitration. This will constitute the “Terms of Reference” for the case. Notwithstanding the following paragraphs of this agreement, the competent authorities may also, in the Terms of Reference, provide procedural rules that are additional to, or different from, those included in these paragraphs and deal with such other matters as are deemed appropriate.