Billing Code - PHMSA - Department of Transportation

comments that opposed our proposals to incorporate these standards and will adopt them in
this final rule.
Chemical under pressure:
In the NPRM, PHMSA proposed to amend the HMT to include individual entries
for chemical under pressure and incorporate other safety requirements including, but not
limited to, quantity and filling limits and packaging and segregation requirements.
PHMSA received one comment on this proposal from 3M in support of the proposals to
add entries for chemical under pressure. 3M requested we authorize the use of non-
refillable cylinders larger than 1.25 liters containing flammable gas consistent with the UN
Model Regulations. PHMSA’s intent regarding the chemical under pressure entry was to
comprehensively align the requirements of this entry with international standards. In this
final rule we are revising the packaging requirements for chemical under pressure to
authorize the use of non-refillable cylinders larger than 1.25 liters for chemical under
pressure.
Aircraft Batteries:
In the NPRM, PHMSA proposed to revise the HMR to permit the transport of wet
cell aircraft batteries and lithium ion aircraft batteries aboard passenger aircraft in excess
of the quantity limited specified in column 9A of the HMR. PHMSA received comments
from Saft and PRBA in support of these proposed amendments because these changes
would further harmonize the HMR with the ICAO Technical Instructions. Both Saft and
PRBA cite a requirement in the "FAA Modernization and Reform Act of 2012” (§ 828,
Pub. L 112-95; 126 Stat. 133 (Feb 14, 2012)) (FAA Modernization and Reform Act of
2012) that states the Secretary of Transportation, including a designee of the Secretary,
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