How must hazardous materials packages that are not permanently attached to the vehicle be secured?
Correct answer: C – Secured against shifting, including movement between packages
Federal regulations require each hazardous materials package not permanently attached to the vehicle to be secured against shifting. This includes relative motion between packages. Packages with valves or fittings must also be loaded to minimize the likelihood that those components will be damaged during transportation.
Source: Montana Commercial Driver License Manual — § 9.4.1, “General Loading Requirements”, 49 CFR § 177.834(a) – General requirements

