A cargo transport unit or bulk container containing dangerous goods or residues of dangerous goods shall clearly display placards as follows;
.1 a freight container, semi-trailer, a closed or sheeted bulk container or portable tank: one on each side and one on each end of the unit. Portable tank having a capacity of not more than 3,000 L may be placarded or alternatively, may be labelled instead, on only two opposite side;
.2 a railway wagon: at least on each side;
.3 a multiple-compartment …