IATA Markings UN Specification

The UN specification packaging marking must consist of the following:

• The UN packaging symbol
• The code number designating the types of packaging (6.0.3)
• The letter X, Y, or Z to designate that the design type for the associated packing group has been successfully tested
• X indicates Packing Group I (This packing group has the strictest requirements and can be used for articles and substances in any packing group.)
• Y indicates Packing Group II (This can be used for articles and substances in Packing Group II or III.)
• Z indicates Packing Group III (This can be used for articles and substances in Packing Group III only.)
• A number that indicates the relative density (for liquids) or the maximum gross weight (for solids and inner packagings)
• A number that indicates the hydraulic test pressure, shown in kPa, for liquids, or the letter "S" for solids and inner packagings
• The last two digits of the year in which the packaging was manufactured (Packaging types 1H1, 1H2, 3H1, and 3H2 must also include the month of manufacture.)
• International Vehicle Registration Code (VRI), which indicates the State authorizing the mark (These codes are shown in Appendices D.1 and D.2.)
• Manufacturer's name or other identifying mark

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