The symbol “A” in column 1 of the Hazardous Materials Table means the hazmat rules apply primarily under which condition?

• A. Subject to hazmat rules only when transported by air, unless exempted
• B. Subject to hazmat rules only when transported by sea
• C. The material is not hazardous
• D. The material is radioactive

Answer: (A)

The symbol indicates air transport is the mode where hazmat rules apply. The A in column 1 flags that this material is regulated under hazmat requirements primarily when it is shipped by air (with possible exemptions). This helps you know that, for air shipments, you must follow the hazmat rules, while other modes may have different applicability or exceptions. It doesn’t mean the material isn’t hazardous, nor does it imply sea transport or radioactivity; those would be shown by other indicators or sections.