I will answer that one.
Protective direction 36, as you know, was recently issued. It brought a number of improvements that municipalities and railroads worked together on.
However, dangerous goods are assessed by the shipper, the person responsible for transporting the dangerous goods under the Transportation of Dangerous Goods Act and regulations. There are various tests and criteria to determine whether or not a particular cargo or goods are considered dangerous. There are nine classes of dangerous goods. It is up to the shipper to assess whether or not it meets the criteria for dangerous goods.
Once those criteria have been met and it is established that these are indeed dangerous goods, the shipper must determine the proper means of containment for transporting those dangerous goods, ensure proper awareness—that the proper placarding is placed on that means of containment—and ensure that the proper shipping documents are prepared.
In addition, certain dangerous goods, such as a number of flammable liquids, require an emergency response assistance plan.
So there is a whole process and a whole set of requirements under the act and the regulations that determine that.