is of the opinion that a dispute of which a Court has cognizance relates to a matter of public importance; and
(b)
has caused a notification to be published in the Gazette stating that he is of that opinion and that he intends to intervene in proceedings before the Court in relation to the dispute,
the Attorney-General may intervene in those proceedings by causing a copy of the notification to be served on the Registrar.
(2) Where the Attorney-General has intervened in proceedings before the Court, the Court may grant leave to any trade union or person to intervene in those proceedings.