7.—(1) A person shall not consign (whether as principal or agent for another) a substance which is dangerous for carriage, unless it has been classified in accordance with the following paragraphs of this regulation.
(2) In the case of a substance which is specified in Part 1 of the approved carriage list as dangerous for carriage, the classification shall be that specified in the entry for that substance in column 3 of that Part.
(3) In the case of a substance which, while not listed in Part 1 of the approved carriage list as dangerous for carriage, is in one of the groups of substances listed in Part 2 the classification shall be that specified in the entry for that group in column 3 of that Part.
(4) In the case of an article specified in Part 3 of the approved carriage list, to which these Regulations are applied by regulation 3(6), the classification shall be that specified in the entry for that article in column 3 of that Part.
(5) In any other case, the classification of the substance shall be that specified in column 2of Part I of Schedule 3 corresponding to the most hazardous of the characteristic properties ofthe substance specified opposite thereto in column 1 of that Part.