Ask X3What does 49 CFR 172.336 (Identification numbers; special provisions) require?
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As Ask X3, your fleet-compliance assistant, here is what 49 CFR 172.336 requires based on the provided text:
* Optional Display: When not required or prohibited, identification numbers may be displayed on a transport vehicle or freight container following the rules prescribed in this subpart.
* Required Display Formats: When identification numbers are required, they must be displayed either on orange panels or on a plain white square-on-point display configuration that has the exact same outside dimensions as a placard.
* Association with Placards: For materials in hazard classes that require placards and identification numbers, but where numbers cannot be placed directly on the authorized placards, you must display the numbers on orange panels or the plain white square-on-point configuration right next to the required placards. (Note: A white square-on-point display showing an identification number is not considered a placard).
* Dimensions and Borders: The area containing the identification number must measure 100 mm (3.9 inches) by 215 mm (8.5 inches), be located as prescribed by § 172.332 (c)(1) and (c)(2), and may have a solid or dotted line border.
* Exceptions for Tanks: The regulation outlines specific alternative marking requirements (or exemptions from identification numbers) under certain conditions for portable tanks, cargo tanks, tank cars, and nurse tanks containing multi-compartments, gasoline, fuel oil, certain appurtenances, or multiple petroleum distillate fuels (as detailed in 49 CFR 172.336(c)).
* Labeled Bulk Packagings: When a bulk packaging is labeled instead of placarded under § 172.514(c), you may display identification numbers according to the marking requirements in § 172.301(a)(1).