What does 49 CFR 172.304 (Marking requirements) require?

Short answer

The marking requirements under 49 CFR 172.304 include:

1. The marking must be durable, in English and printed on or affixed to the surface of a package or on a label, tag, or sign.

2. The marking must be displayed on a background of sharply contrasting color.

3. The marking must be unobscured by labels or attachments.

4. The marking must be located away from any other marking that could substantially reduce its effectiveness.

The rule says

"Must be durable, in English and printed on or affixed to the surface of a package or on a label, tag, or sign." (49 CFR 172.304(a)(1))

"Must be displayed on a background of sharply contrasting color" (49 CFR 172.304(a)(2))

"Must be unobscured by labels or attachments" (49 CFR 172.304(a)(3))

"Must be located away from any other marking (such as advertising) that could substantially reduce its effectiveness." (49 CFR 172.304(a)(4))

In plain English

These marking requirements are crucial for ensuring that hazardous materials are properly identified and handled during transportation. The markings must be clear, visible, and not obscured by other labels or attachments, allowing handlers to quickly and accurately identify the contents of a package. This is particularly important in emergency situations where rapid identification of hazardous materials can be critical. The requirements also help to prevent mix-ups or misidentification of packages, which can have serious consequences.

What to do

• Ensure all markings on hazardous materials packages are durable and in English.
• Verify that markings are displayed on a background of sharply contrasting color.
• Check that markings are not obscured by labels or attachments.
• Confirm that markings are located away from other markings that could reduce their effectiveness.