If the Terms of Reference have not been communicated to the person who made the request for arbitration within the period referred to in paragraph 3 above, that person and each competent authority may, within one month after the end of that period, communicate in writing to each other a list of issues to be resolved by the arbitration. All the lists so communicated during that period shall constitute the tentative Terms of Reference. Within one month after all the arbitrators have been appointed as provided in paragraph 5 below, the arbitrators shall communicate to the competent authorities and the person who made the request for arbitration a revised version of the tentative Terms of Reference based on the lists so communicated. Within one month after the revised version has been received by both of them, the competent authorities will have the possibility to agree on different Terms of Reference and to communicate them in writing to the arbitrators and the person who made the request for arbitration. If they do so within that period, these different Terms of Reference shall constitute the Terms of Reference for the case. If no different Terms of Reference have been agreed to between the competent authorities and communicated in writing within that period, the revised version of the tentative Terms of Reference prepared by the arbitrators shall constitute the Terms of Reference for the case.
