8. If all or any of the ballast on the vehicles is being carried in such circumstances that paragraph 7 does not apply thereto, there shall before the journey begins be delivered to the person in charge of the vehicle a document containing a statement to that effect signed by or on behalf of the person causing that ballast to be carried and giving the name and address of the last-mentioned person, and if this paragraph is contravened the last-mentioned person shall be guilty of an offence; but this paragraph shall not apply where all the ballast in the vehicle is being carried in such circumstances as aforesaid and is being so carried in a container which does not form part of the vehicle.N.I.