# Keller and Heckman, LLP — Hazardous Materials Safety Interpretation

**Citation:** 22-0024  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2022-06-29

22-0024 response to Keller and Heckman, LLP concerning 171.15, 171.16, 172.502, 173.159.

## Document text

<<<PAGE 1>>>

1200 New Jersey Avenue, SE
Washington, DC 20590
U.S. Department
of Transportation
Pipeline and Hazardous
Materials Safety
Administration
June 29, 2022
Trent Doyle
Keller and Heckman, LLP
1001 G Street, NW
Washington, D.C. 20001
Reference No. 22-0024
Dear Mr. Doyle:
This letter is in response to your April 7, 2022, letter requesting clarification of the Hazardous
Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to placarding requirements for
certain lead acid battery shipments. You state that “UN2794, Batteries, wet, filled with acid,
electric storage, 8” will be shipped by a motor carrier from a stateside facility and taken to a port
where the batteries will be loaded on a vessel and transported overseas. The batteries will be
packaged in intermodal containers that will be placarded and the completed packages will be
prepared in accordance with the International Maritime Dangerous Goods (IMDG) Code.
Furthermore, you state the motor vehicle portion of the shipment will be transported in
accordance with § 173.159(e), which to your understanding provides a general exception from
the HMR when batteries containing acid are transported via motor vehicle. Therefore, you ask
whether motor vehicle drivers who are transporting these batteries to the port for vessel
transportation are required to have a commercial driver’s license (CDL) hazardous materials
endorsement in accordance with the Federal Motor Carrier Safety Regulations (FMCSR) even
though the intermodal containers are placarded to satisfy the IMDG Code requirements for
vessel transportation.
The answer is no. For purposes of the FMCSR, a hazardous materials endorsement on a CDL is
required for operation of a motor vehicle used to transport hazardous materials as defined in
49 CFR 383.5. The FMCSR define hazardous materials as any material that has been designated
as hazardous under 49 U.S.C. 5103 and is required to be placarded under Subpart F of 49 CFR
Part 172; or any quantity of material listed as a select agent or toxin in 42 CFR Part 73.
Additionally, for purposes of the HMR, if all the requirements provided in § 173.159(e) are met,
wet electric storage batteries are not subject to any other requirements of the HMR—including
placarding—except for incident reporting requirements found in §§ 171.15 and 171.16. Thus, it
is the understanding of this Office, that a driver of a commercial motor vehicle transporting this
material would not be subject to the requirements of the FMCSR for a hazardous materials

<<<PAGE 2>>>

endorsement on a CDL because the material is neither subject to placarding nor a select agent or
toxin.
Note, in accordance with § 172.502(c), placards may be displayed for a hazardous material—
even when not required—if the placarding otherwise conforms to the requirements of the HMR
and thus permissive placarding does not trigger the requirements for a hazmat endorsement.
I hope this information is helpful. Please contact us if we can be of further assistance.
Sincerely,
Dirk Der Kinderen
Chief, Standards Development Branch
Standards and Rulemaking Division

<<<PAGE 3>>>

Baker
From: Kelley, Shane (PHMSA)
To: Cc: Date: Attachments: Dodd, Alice (PHMSA); Hillman, Kenetha CTR (PHMSA)
DerKinderen, Dirk (PHMSA); Foster, Glenn (PHMSA); Nickels, Matthew (PHMSA)
Subject: Fwd: request for interpretation
Thursday, April 7, 2022 8:17:07 PM
placarding letter of interpretation request April 2022.pdf
22-0024
Please process accordingly thank you.
From: Doyle, Trent <Doyle@khlaw.com>
Sent: Thursday, April 7, 2022 4:33:39 PM
To: Kelley, Shane (PHMSA) <shane.kelley@dot.gov>
Cc: DerKinderen, Dirk (PHMSA) <Dirk.DerKinderen@dot.gov>
Subject: request for interpretation
CAUTION: This email originated from outside of the Department of Transportation (DOT). Do not click on links
or open attachments unless you recognize the sender and know the content is safe.
Gentlemen,
Please see attached request for letter of interpretation regarding applicability of placarding requirements to certain
lead acid battery shipments.
Let me know if there are any questions about the request. (I note that Ref. No. 15-0075 appears to address a
somewhat similar scenario.)
Thank you.
Best regards,
Keller and Heckman LLP logo
Trent Doyle
Partner
direct 202.434.4161 Doyle@khlaw.com
Keller and Heckman LLP | 1001 G Street NW, Suite 500 West | Washington, DC 20001
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<<<PAGE 4>>>

khlaw.com
202.434.4100
Keller and Heckman LLP
1001 G Street, NW
Suite 500 West
Washington, DC 20001
Writer’s Direct Access
T r e n t D o y l e
( 2 0 2 ) 4 3 4 - 4 1 6 1
d o y l e @ k h l a w. c o m
April 7, 2022
Via Electronic Mail
Shane Kelley
Standards and Rulemaking Division
Pipeline and Hazardous Materials Safety
Administration
Attn: PHH-10
U.S. Department of Transportation, East
Building
1200 New Jersey Avenue, SE
Washington, DC 20590-0001
Re: Request for Letter of Interpretation – Placarding Requirements for certain
lead acid battery shipments
Dear Mr. Kelley:
Consistent with 49 C.F.R. § 105.20(a)(4), the purpose of this letter is to request clarification regarding
the applicability of placarding requirements under the U.S. Department of Transportation (DOT)
hazardous materials regulations (HMR) to the transport of certain lead acid batteries.
Specifically, lead acid batteries (UN2794) are to be shipped from a U.S. facility by motor carrier to a
port and then loaded onto a vessel for overseas transport. The batteries will be shipped in intermodal
containers and, to facilitate international transport, the shipments will be prepared in compliance with
the IMDG Code, which will include placarding of the intermodal containers.
Per 49 C.F.R. § 171.25(a), a hazardous material may be transported to/from/within the U.S. by vessel
and by motor carrier in accordance with the IMDG Code provided all or part of the movement is by
vessel. 49 C.F.R. § 171.25(b)(1) provides, in part, that for transportation by highway prior to
transportation by vessel of a hazardous material in accordance with IMDG Code, the motor vehicle
must be placarded in accordance with subpart F of 49 C.F.R. part 172.
Washington, DC Brussels San Francisco Shanghai Boulder
This document was delivered electronically.

<<<PAGE 5>>>

Shane Kelley
Standards and Rulemaking Division
Page 2
However, in this case, for the ground leg, the batteries will be shipped in compliance with 49 C.F.R.
§ 173.159(e), and, accordingly, no other requirements of the HMR, including placarding, are
applicable.
Considering the above, we understand that because placarding is not required under subpart F of 49
C.F.R. part 172 for the ground leg by virtue of the relief provided under 49 C.F.R. § 173.159(e), the
drivers of motor vehicles carrying the batteries in intermodal containers to the port would not need to
have a CDL with a hazmat endorsement in accordance with 49 C.F.R. § 383.93(b)(4).
Please confirm whether PHMSA agrees with this interpretation.
Thank you for your assistance with this request. Please contact me at (202) 434-4161 or
doyle@khlaw.com if you have any questions or desire additional information.
Sincerely,
Trent Doyle
This document was delivered electronically. Keller and Heckman LLP

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/76596/220024.pdf>
- Source ID: `phmsa`
- SHA-256: `3f2d3fd55586d71afdd52d324adef96236d803b9a3f8a09427e7604c0e1d7013`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T00:43:30.655Z
- Document slug: `phmsa-interpretation-22-0024`

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