Is not subject to the requirements of RID with the exception of section 5.5.3.
Packages shall be marked "CARBON DIOXIDE" or "DRY ICE".
Wagons and containers that are not well ventilated shall be marked with a warning mark, as specified in 5.5.3.6.2, affixed at each access point in a location where it will be easily seen by persons opening or entering the wagon or container.