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Federal Register / Vol. 86, No. 151 / Tuesday, August 10, 2021 / Proposed Rules veterinary authority where persons or animals may have been exposed to package contents is intended to ensure appropriate medical attention can be provided in the event of an exposure and any potential further contamination as a result of contact with the material is controlled. This new stowage code serves to ensure vessel carriers are aware of the potential hazard of these packages and to ensure they follow all protocols related to handling such packages.
New stowage code 156 is assigned to UN3090, Lithium metal batteries, UN3091, Lithium metal batteries contained in equipment, or Lithium metal batteries packed with equipment, UN3480, Lithium ion batteries, and UN3481, Lithium ion batteries contained in equipment or Lithium ion batteries packed with equipment. This new stowage provision would require damaged or defective lithium batteries that are offered for transportation in accordance with 173.185f or being transported for purposes of disposal or recycling in accordance with proposed 172.203i4, to be stowed in accordance with stowage category C.
Stowage category C requires on deck stowage instead of the currently authorized on deck or under deck stowage of these types of lithium batteries. This proposal harmonizes HMR stowage requirements for lithium batteries that are damaged/defective and those that are being offered for disposal or recycling with the IMDG Code stowage requirements. This proposed stowage change to require on deck stowage would allow for more easily identifiable and effective response actions in the event of a fire involving lithium batteries onboard a vessel.
PHMSA expects that these revised shipping requirements will contribute to the safe transportation of increased volumes of lithium batteries anticipated as a result of the increased use of those technologies in the transportation and other economic sectors.
New stowage code 157 is assigned to the five HMR UN1950 aerosol entries and the three UN2037 receptacles;
small, containing gas or gas cartridges entries. This new stowage provision would require aerosols and receptacles for gas transported for recycling or disposal to be stowed in accordance with vessel stowage category C and clear of living quarters. The HMR does not currently contain separate stowage provisions for aerosols or receptacles small containing gas that are being offered for disposal or recycling. These materials are assigned stowage category A if they are new and never used, or if
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they are offered for transportation. The change from stowage category A to category C means these materials being offered for recycling or disposal would be required to be stowed on deck only instead of the currently authorized on deck or under deck. This proposed change in stowage requirements for aerosols and receptacles small containing gas provides more restrictive stowage requirements for these articles that have been utilized and are being offered for transportation under generally more relaxed packaging standards than if they were being offered as new articles. This more restrictive stowage requirement would more easily facilitate a response effort should one be required aboard a vessel.
Third, in the paragraph c2 table, PHMSA proposes amending stowage provisions for notes 19E and 22E. When assigned to an HMT entry, these existing notes require separation away from explosives containing chlorates or perchlorates and away from ammonium compounds and explosives containing ammonium compounds or salts. PHMSA proposes to amend these stowage provisions to specify a more demanding separated from stowage requirement. The terms away from and separated from have various meanings based on the type of shipment e.g., break-bulk, shipments within a container, or container to container.
Generally speaking, the term separated from requires more stringent segregation. As an example, for segregation from one container to another if away from applies, the containers cannot be stowed one on top of the other. If separated from is assigned, the containers cannot be stowed in the same vertical line. For more information on the applicability of these terms please, see 176.83 of the HMR. This proposal also harmonizes the HMR with the IMDG Code and aligns with HMR stowage requirements for shipments of ammonium nitrates, chlorates, and perchlorates. These proposed changes provide additional segregation between loads of incompatible materials and decrease the likelihood of a reaction if a release were to occur onboard a vessel.
F. Part 178
Section 178.3
Part 178 contains specifications for packagings. Section 178.3 prescribes marking requirements for specification packagings. PHMSA proposes to amend paragraph a4 to clarify the marking size requirement for packagings transporting solids with a 30 kg 66
pounds maximum net mass.

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Additionally, PHMSA is proposing to amend the exception for reducing the size of the required package marking applicable to packagings with a capacity of 5 L or less, or of 5 kg maximum net mass. The existing HMR text only refers to capacity, and the proposed use of maximum net mass is a more appropriate standard for packagings intended for solids. This editorial change is intended to reduce confusion over the application of the reduce size marking requirements as they apply to packagings used for solid materials. The quantity limit should be based on the net amount of solid material and not the capacity of the packaging the material is placed in. This clarification is consistent with similar provisions for solids net mass and liquids capacity throughout the HMR. Ensuring the appropriate application of the reduced size marking allowance provides consistency across persons using the reduce sized marking and therefore, improves safety of transport.
Section 178.71
Section 178.71 prescribes specifications for UN pressure receptacles. To maintain consistency with the UN Model Regulations, PHMSA proposes to update four ISO
documents incorporated by reference in this section.
First, PHMSA proposes to amend paragraph d2, which outlines the configuration and design requirements for a cylinders service equipment, and includes items that prevent the release of the pressure receptacle contents during handling and transportation.
Currently this paragraph requires that valves for service equipment must conform to the 1999, 2006 and 2014
editions of ISO 10297. ISO 10297
specifies design, type testing and marking requirements for cylinder valves fitted to refillable transportable gas cylinders, main valves for cylinder bundles, and cylinder valves or main valves with an integrated pressure regulator VIPR, which convey compressed, liquefied, or dissolved gases. PHMSA proposes to modify the valve conformance requirements in this paragraph such that when the use of a valve is prescribed, the valve must conform to the requirements of ISO
10297:2014 and the supplemental amendment, ISO 10297:2014/Amd 1:2017. ISO 10297:2014/Amd 1:2017
corrects errors in ISO 10297:2014 and also includes modifications for valves for tubes and pressure drums. PHMSA
has reviewed this supplemental amendment as part of its regular participation in the review of amendments proposed for the UN

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