Which statement is true regarding DOT (ICC) containers?

The statement that all data must be stamped into the container is accurate because DOT (Department of Transportation) containers are regulated for safety and compliance. This regulation mandates that specific information, such as the manufacturer’s name, serial number, and other important details, must be permanently marked on the container to ensure traceability and safety standards are met. This ensures that users can easily verify the container’s compliance with relevant regulations and ascertain its service history.

In contrast, while other options touch on certain attributes of DOT containers, they inaccurately represent the regulations surrounding them. For instance, DOT containers indeed require periodic testing and retesting to ensure their continued safety and integrity, and they cannot be made from just any type of metal as they must adhere to specific material regulations for pressure vessels. Additionally, when comparing water capacities, ASME containers have their own specifications which do not directly relate to larger capacities in every case, as design and usage parameters differ between the two container types.