49 CFR 172 Special Provisions
Special provisions contain packaging provisions, prohibitions, exceptions from requirements for particular quantities or forms of materials and requirements or prohibitions applicable to specific modes of transportation.
Numeric Codes
These provisions are multi-modal and apply to bulk and non-bulk packagings.
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A-Codes
These provisions apply only to transportation by aircraft.
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B-Codes
These provisions apply only to bulk packagings. Except as otherwise provided in this subchapter, these special provisions do not apply to UN portable tanks or IBCs.
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IB-Codes and IP-Codes
These provisions apply only to transportation in IBCs and Large Packagings.
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N-Codes
These provisions apply only to non-bulk packagings.
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R-Codes
These provisions apply only to transportation by rail.
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T-Codes
These provisions apply to the transportation of hazardous materials in UN portable tanks.
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TP-Codes
These provisions apply to the transportation of hazardous materials in IM and UN Specification portable tanks.
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W-Codes
These provisions apply only to transportation by water.
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