In order to allow for a clear interpretation of coded instructions, SMDG decided to maintain separate code lists for handling, stowage instruction, and attributes of transport equipment and stowage locations. The definition of these code lists is described in a single Excel workbook with separate tabs explaining the usage of these code lists and the definition of each code list.

The attribute code “PLA” has been changed to “PLX”.
This change is intended to avoid confusion with the abbreviation for a specific type of plastic pellets—polylactic acid, a subcategory of biodegradable plastic pellets—commonly used in public communications.
The update has been agreed upon between SMDG and the WSC.  

Download workbook (version 17-15. January. 2026)