A tractor trailer carrying organic peroxides, other than Type B, is required to have what regarding placards?

When transporting organic peroxides that do not fall under Type B, the regulations dictate that specific placarding requirements must be met based on the classification of the materials. For organic peroxides classified under Type A and Type C, a red placard is typically required to signify their hazardous nature.

However, given that the question specifies "other than Type B," the appropriate classification will often designate a different requirement. In this case, organic peroxides other than Type B may not require a placard at all if they fall under a certain quantity threshold or are considered to be in a less hazardous category, which aligns the answer with the regulation that permits no placard for these specific conditions.

Understanding the nuances of hazardous materials regulations helps reinforce the importance of proper categorization before transport and clarifies why certain materials might not need to be marked with a placard while still ensuring safety during transport operations.