World Rugby Handbook
REGULATION 19. MEDIATION
19.1 In the event of a dispute between Unions and/or Associations, the Unions and/or Associations concerned may request the CEO to appoint a mediator to assist in settling the differences between the parties.
19.2 Only where the CEO and all the parties who are involved in a dispute consent in writing, may a matter be referred to a mediator for consideration in accordance with Clause 19.1 above.