Marking Specifications

All markings must be placed on packages or overpacks so that no part of the marking or any other required marking or label is covered or obscured in any way. Markings that relate to one another should be placed together so as not to cause confusion or limit their effectiveness. In addition, all markings should meet the following requirements:

• Durable and printed or otherwise marked on or affixed to the external surface of the package or overpack
• Readily visible and legible
• Able to withstand open weather exposure
• Displayed on background of contrasting color
• Written in English, in addition to the language required by the State of origin

There are specific size requirements for markings. The marking of the UN/ID number and the letters "UN" or "ID" must be at least 12 mm high, except for packagings of 30 L or 30 kg capacity or less and cylinders of 60 L water capacity, which should have a minimum height of 6 mm.

To learn more about Function Specific topics for Shippers, Packers, Freight Forwarders visit our IATA DGR Shippers, Packers & Freight Forwarders Online Training web page.