Transportation of Dangerous Goods Regulations

4.9 (1) When the conditions that required the display of dangerous goods safety marks change, the person having the charge, management or control of the means of containment must determine, as a result of the new conditions, whether the dangerous goods safety marks must be changed or removed.

(2) The person who neutralizes the contents of the means of containment or who unloads, unpacks, cleans or purges the means of containment must cover or remove the dangerous goods safety mark when the danger indicated by the dangerous goods safety mark is no longer present in the means of containment.

(3) When the DANGER placard is permitted to be displayed on a large means of containment, a person may continue to display that placard, in place of any other placard, until the large means of containment no longer contains any of the dangerous goods identified by that placard.