8.—(1) On the application of the holder of a permit or otherwise, the Department may vary the permit.
(2) An application for the variation of a permit under this section must be made in such form and include such declarations and information as may be prescribed.
(3) The Department may require an applicant to furnish such other information as it considers necessary for dealing with the application.
(4) Section 5 shall apply for the purposes of this section as it applies for the purposes of section 4.