Ask X3What does 49 CFR 173.416 (Authorized Type B packages) require?
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According to 49 CFR 173.416, packages authorized for shipments of quantities exceeding $A_1$ or $A_2$ must meet one of the following requirements:
1. U.S. NRC-Approved Packages: Any Type B(U) or Type B(M) packaging that meets the requirements of 10 CFR part 71 and has been approved by the U.S. Nuclear Regulatory Commission may be shipped under § 173.471.
2. Foreign/IAEA Packages (Import/Export Only): Any Type B(U) or B(M) packaging meeting the "IAEA Regulations for the Safe Transport of Radioactive Material, SSR-6" whose foreign Competent Authority Certificate has been revalidated by DOT pursuant to § 173.473. These are restricted to export and import shipments only.
3. Special Package Authorizations (Domestic Only): A package approved by the U.S. Nuclear Regulatory Commission via a special package authorization under 10 CFR 71.41(d), provided it is used solely for domestic transportation following the requirements of § 173.471(b) and (c).