Billing Code - PHMSA - Department of Transportation

assignment of limited quantity packaging authorizations to Cases, cartridges, empty with
primer (UN0055) be extended to this commodity in the HMR. PHMSA agrees and has
made the relevant text changes to § 173.63. SAAMI also commented that the ORM-D
entries removed from the table should be left until the expiration of the transitional period
for their use. PHMSA agrees and has inserted those proper shipping names back into
§ 173.63.
Section 173.115
Section 173.115 prescribes the definitions for Class 2 materials. Paragraph (k) of
this section specifies how the oxidizing ability of certain Division 2.2 gases is determined.
Currently, the HMR references ISO standards that include test and calculations used to
determine the oxidizing ability of certain Division 2.2 gases. The UN Model Regulations
and the ICAO Technical Instructions replace references to ISO standards 10156:1996 and
10156-2:2005 with the updated version ISO 10156:2010.
Based on its technical review, PHMSA believes the updated standard provides an
adequate level of safety and is referencing the standard in this section and adding it to the
list of IBR materials in § 171.7.
Section 173.121
Section 173.121 prescribes the requirements for selection of packing groups for
Class 3 flammable liquids. Paragraph (b) of this section describes the criteria for inclusion
of viscous Class 3 materials in Packing Group III.
ICAO adopted requirements in the Technical Instructions that increased the
quantity of viscous Class 3 flammable liquids permitted reclassification from Packing
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