The International Maritime Solid Bulk Cargoes (IMSBC) Code is regularly updated to ensure the safe shipment of solid bulk cargoes. The latest amendments (03-15) introduce significant changes to the classification of Materials Hazardous only in Bulk (MHB).

These updates require that if a cargo meets any of the chemical hazard criteria for an MHB, a specific notational reference must now be included in the individual schedule. For example, a combustible solid will now be marked with 'CB', while a corrosive solid will be marked with 'CR'. This new requirement, effective from January 1, 2017, provides clearer, more concise information on the hazards associated with a cargo, improving safety for all involved in the shipping process.