Which hazmat shipments may require air-transport-specific designations or handling?

• A. Some exceptionally hazardous materials or specific operations may have air-transport restrictions, but most hazmat rules apply to all modes.
• B. All hazmat shipments automatically require air transport clearance.
• C. Air transport designations are only for consumer batteries.
• D. There is never any air-specific designation for hazmat.

Answer: (A)

Air transport adds restrictions only for certain very hazardous materials or specific operations, because flying introduces unique safety risks. For those shipments, air‑specific designations or handling requirements are required, but the general hazmat rules still apply across all modes. In other words, some materials or operations may need air‑mode designations, while most hazmat requirements (packaging, labeling, shipping papers, etc.) apply no matter how the cargo is moved. The other choices imply universal air clearance, limit air designations to batteries, or claim there are never air‑specific designations, which isn’t accurate because air regulations do include extra rules for certain goods and situations.