5—(1) A declaration under section 1 may, on an application made at any time by any person, be varied or revoked by an order of the High Court.
(2) The Court must refuse to hear an application under subsection (1) if it considers that the applicant does not have a sufficient interest in the determination of that application.
(3) An order made under subsection (1) is referred to in this Act as a “variation order”.
(4) A variation order may make any determination referred to in section 4(1)(a) or (c).
(5) Notice of the making of a variation order shall be served by the Court on—
(a)the Registrar General;
(b)any person who applied for the declaration under section 1 to which the application under subsection (1) relates.