In this Chapter, unless the context otherwise requires,
(a) class label, in relation to any dangerous or hazardous goods, means the class label specified in column 3 of the Table to rule 137;
(b) consignor, in relation to dangerous or hazardous goods intended for transportation by a goods carriage, means the owner of such dangerous or hazardous goods;
(c) dangerous or hazardous goods, means the goods of dangerous or hazardous nature to human life specified in Tables I, II, and III to rule 137;
(d) emergency information panel, means the panel specified in rule 134;
(e) primary risk, in relation to any dangerous or hazardous goods, means the most potent risk which such goods give rise to;
(f) subsidiary risk, in relation to any dangerous or hazardous goods, means the subsidiary risk which such goods are likely to give rise to in addition to the primary risk.