When petroleum crude oil contains hydrogen sulphide in sufficient concentration that vapours evolved from the crude oil can present an inhalation hazard, the words “toxic by inhalation” or “toxic — inhalation hazard” or “toxique par inhalation” or “toxicité par inhalation” must be included
on a large means of containment, next to the placard for the primary class; and
on the shipping document, after the description required under section 3.5(1)(c) of Part 3 (Documentation).