Article 4 Interested persons
(1)
A person may become a party to a reference pursuant to section 11(4) or 12(3) of the Act if, not less than 21 days before the date fixed for the hearing of the reference, he serves on the Secretary of State a notice stating that he desires to be heard on the reference. On receipt of the notice the Secretary of State shall serve a copy on the President and on the appellant.
(2)
The notice shall state—
(a)
the name and address of the interested person;
(b)
the address in the United Kingdom at which documents relating to the reference may be served; and
(c)
particulars of the interest in the reference.