All dangerous goods that are regulated under the various transport regulations must be contained in UN approved packages for transport.

All packages must undergo rigorous testing before they are considered UN approved. The approval marking is then printed or embossed on the package like in the picture on the left.

Drums and IBCâ??s are marked in similar, but slightly different, formats. The two examples below show how the markings can be decoded.

The first example (in red) shows the approval marking for an open-top steel drum, approved to carry packing group (PG) II or Ill liquids of specific gravity 1.4 or lower. It was manufactured in the Netherlands in 2008. Using the legend it is possible to decode the markings on all drums. More examples are given throughout the guide.