ICAO recognizes the importance of this type of cargo and has takensteps to ensure that such cargo can be carried safely. Thishas been
donebyadoptingAnnex18,togetherwiththeassociateddocumentTechnicalInstructionsfortheSafeTransportofDangerousGoods
by Air. Other codes have existed for regulating the carriage of dangerous goods by air, but these did not apply internationally or were
difficult to enforce internationally and, moreover, were not compatible with the corresponding rules of other transport modes.