Lastly, the Parenting Coordinator may meet with both parents together in a joint session wherein issues of concern are discussed. If there is sufficient cause or reason that the parents cannot be seen together, alternate arrangements may be made, appropriate to the circumstances at the discretion of the Parenting Coordinator. If matters cannot be resolved through discussion, then either party or the Parenting Coordinator may call an impasse and move the matter to be settled by arbitration assuming an arbitrator has been preselected.