What is the purpose and procedure for applying Limited Quantity (LQ) exceptions under the IMDG Code?

The purpose of the Limited Quantity (LQ) exceptions under the IMDG Code is to reduce the regulatory burden for the transport of small quantities of certain dangerous goods that pose a relatively low risk. The LQ provisions allow these goods to be transported under less stringent packaging, labeling, and documentation requirements than would otherwise be required. To apply the LQ exceptions, several conditions must be met. First, the dangerous goods must be listed in the IMDG Code's Dangerous Goods List and have a corresponding LQ quantity limit specified. This limit represents the maximum quantity of the substance that can be packed in an inner packaging. Second, the inner packagings must be packed into suitable outer packagings that meet certain general requirements for strength and integrity. The total gross mass of the package must not exceed 30 kg (or 20 kg for transport in passenger aircraft). Packages prepared according to LQ provisions must be marked with a specific LQ mark, which is a diamond shape with black points on the top and bottom and white or contrasting color in the middle. In some cases, the UN number of the goods may also be required to be displayed. While full shipping documentation is not required for LQ shipments, a declaration stating that the package contains dangerous goods in limited quantities may be necessary. Applying the LQ exceptions simplifies the transport of small quantities of dangerous goods, making it more efficient and cost-effective, while still maintaining an acceptable level of safety. However, it is crucial to strictly adhere to all the conditions and requirements specified in the IMDG Code to ensure compliance and prevent accidents.