What do the letters “A” and “W” in Column 1 of the Hazardous Materials Table indicate?
Correct answer: D. – The material is generally regulated only when offered for air transport (A) or water transport (W), subject to listed exceptions
An “A” generally means the material is subject to the hazardous-materials regulations only when offered or intended for air transportation. A “W” generally applies only when it is offered or intended for transportation by water. Hazardous substances, hazardous wastes, and, for “W,” marine pollutants may be subject to additional treatment under the stated exceptions.
Source: North Dakota Commercial Driver License Manual (2025–2027) — § 9.3.3, “Lists of Regulated Products”, 49 CFR § 172.101(d)(1)–(2) — Hazardous Materials Table

