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Regulations Section Interpretation List

Below is a list of the sections that have interpretations available for the selected category. To view the interpretations for a given section, click on the subject link below. To return to the list of Parts, use the Parts link above. Finally, these interpretations are specific to the scenarios in which they are responding to and may not be applicable to different fact scenarios.

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Section Subject
173.13 Exceptions for Class 3, Divisions 4.1, 4.2, 4.3, 5.1, 6.1, and Classes 8 and 9 materials
173.21 Forbidden materials and packages
173.22 Shipper's responsibility
173.22a Use of packagings authorized under special permits
173.23 Previously authorized packaging
173.24 General requirements for packagings and packages
173.24a Additional general requirements for non-bulk packagings and packages
173.24b Additional general requirements for bulk packagings
173.25 Authorized packagings and overpacks
173.26 Quantity limitations
173.27 General requirements for transportation by aircraft
173.28 Reuse, reconditioning and remanufacture of packagings
173.29 Empty packagings
173.30 Loading and unloading of transport vehicles
173.31 Use of tank cars
173.32 Requirements for the use of portable tanks
173.33 Hazardous materials in cargo tank motor vehicles
173.35 Hazardous materials in IBCs
173.36 Hazardous materials in Large Packagings
173.40 General packaging requirements for toxic materials packaged in cylinders
173.41 Sampling and testing program for unrefined petroleum-based products
173.50 Class 1-Definitions
173.52 Classification codes and compatibility groups of explosives
173.54 Forbidden explosives
173.56 New explosives-definition and procedures for classification and approval
173.58 Assignment of class and division for new explosives
173.59 Description of terms for explosives
173.60 General packaging requirements for explosives
173.61 Mixed packaging requirements
173.62 Specific packaging requirements for explosives
173.63 Packaging exceptions
173.64 Exceptions for Division 1.3 and 1.4 fireworks
173.65 Exceptions for Division 1.4G consumer fireworks
173.66 Requirements for bulk packagings of certain explosives and oxidizers
173.115 Class 2, Divisions 2.1, 2.2, and 2.3-Definitions
173.116 Class 2-Assignment of hazard zone
173.120 Class 3-Definitions
173.121 Class 3-Assignment of packing group
173.124 Class 4, Divisions 4.1, 4.2 and 4.3-Definitions
173.125 Class 4-Assignment of packing group
173.127 Class 5, Division 5.1-Definition and assignment of packing groups
173.128 Class 5, Division 5.2-Definitions and types
173.132 Class 6, Division 6.1-Definitions
173.133 Assignment of packing group and hazard zones for Division 6.1 materials
173.134 Class 6, Division 6.2-Definitions and exceptions
173.136 Class 8-Definitions
173.137 Class 8-Assignment of packing group
173.140 Class 9-Definitions
173.141 Class 9-Assignment of packing group
173.144 Other Regulated Material (ORM)-Definitions