—(1) Where the Registrar is unable to achieve a settlement acceptable to all the parties to the dispute, he shall —
fix a place and date for hearing the claim and give notice thereof in the prescribed form to the claimant; and
as soon as is reasonably practicable, cause a copy of the written claim and a notice in the prescribed form of the place and date of hearing to be served on —
the respondent; and
every person who appears from the claim form to have a sufficient interest in the settlement of the dispute to which the claim relates.
(2) The Registrar may summon any person to appear before a tribunal if, in his opinion, the presence of the person is necessary to enable the tribunal to determine the questions in dispute in the claim.
(3) Service of a copy of the written claim and the notice of hearing and of a summons or any document that is to be served on any person in any proceedings before a tribunal may be effected by such person as may be appointed by the Registrar for the purpose.