All containers must be labeled. According to federal Department of Transportation (DOT) rules in 49 CFR 173.25, a shrink-wrapped or stretch-wrapped pallet of containers is considered an over-pack container. Prior to shipping the shrink-wrapped pallet off-site, each container must be marked and labeled according to the applicable DOT requirements in 49 CFR Part 172. If individual container labels are clearly visible, then labeling the outside of the shrink-wrapped pallet is not required.
Note: For more information on DOT hazardous material requirements, call the DOT Information Hotline at (800) 467-4922.