31. After hearing a dispute, the Registrar shall refer it to the Tribunal if—
(a) the parties have failed to reach a mediated agreement and the Registrar is satisfied that there is no reasonable likelihood of such an agreement being reached;
(b) a party who has been notified of the hearing under section 25 fails to attend the hearing;
(c) a party breaches the terms of a mediated agreement filed under subsection 30 (1);
(d) 90 days after the dispute is referred to the Registrar—
(i) a mediated agreement has not been filed under subsection 30 (1); and
(ii) the dispute has not been referred to the Tribunal under paragraph (a); or
(e) the Registrar is otherwise satisfied that the dispute should be heard by the Tribunal.