Which placard can be omitted according to commander approval?

• A. 1.1
• B. 1.2
• C. 1.3
• D. 1.4

Answer: (D)

The important idea here is how placards convey the level of explosive hazard and when exceptions are permitted. Placing a placard signals the specific danger to anyone handling, storing, or responding to an incident, so higher-hazard classes must be clearly identified.

Among the hazard classes listed, the 1.4 designation represents a very low or minor explosive hazard — the kind that generally doesn’t pose a significant blast, projection, or heat risk beyond the package. Because of that minimal risk, commanders can authorize omitting the 1.4 placard under the proper conditions. This keeps operations smoother while still enforcing safety through other controls such as storage limits, distance, access, containment, and standard handling procedures.

The other hazard classes indicate more substantial risks: 1.1 signals a mass explosion hazard, 1.2 a projection hazard, and 1.3 a fire hazard. Each of these requires visible placards to communicate the danger clearly to personnel and emergency responders. Omitting those would reduce situational awareness and increase risk, so they cannot be omitted.

So, the placard that can be omitted with commander approval is the 1.4 placard, provided the required regulatory conditions and safety measures are still respected.