6.—(1) If the designated authority determine that they would issue a different classification certificate, they shall cancel the classification certificate previously issued and issue a new one.
(2) The cancellation and issue referred to above shall take effect after the expiry of three months from the date of the designated authority’s determination.
(3) The three month period shall be suspended on the lodging of an appeal against the determination in accordance with arrangements made for such appeals and shall resume on the determination of the appeal.