Commonwealth Consolidated RegulationsFor subparagraph 471.15 (1) (b) (ii) of the Code, the following substances and things must not, without exception, be carried by post:
(a) gas that is so toxic or corrosive to humans as to pose a hazard to health;
(b) a thermally unstable substance that is likely to undergo a strongly exothermic decomposition;
(c) a substance that ignites or self-heats when in contact with air.