When are orientation arrows required as part of a container label for hazardous material?

Orientation arrows are required on container labels for hazardous materials when the package is not upright during transport and the contents must remain in a specific orientation to avoid hazards. This includes materials that are liquid, fragile, or otherwise sensitive to orientation. The arrows indicate the correct upright position for the container to ensure safe handling and minimize risks. Compliance with these labeling requirements is essential for the safe transport of hazardous materials.