# Mr. David C. DeLuca — Hazardous Materials Safety Interpretation

**Citation:** 01-0089  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2001-06-20

01-0089 concerning 171.1.

## Document text

<<<PAGE 1>>>

J.S. Department
Research and
of Transportation
400 Seventh St.; S.W.
Washington, D.C. 20590
Special Programs
Administration
JUN 2 O 2001
Mr. David C. Deluca
2320 W. Columbia Street
Ref. No.: 01-0089
Allentown, PA 18104
Dear Mr. DeLuca:
This responds to your letter dated April 9, 2001, regarding the
applicability of the Hazardous Materials Regulations: (HMR; 49 CFR
Parts 171-180) to equipment installed and maintained as an
integral part of a motor vehicle.
Specifically, you inquire
under the HMR when installed in a privately owned automobile.
The answer is no.
materials in commerce.
The HMR govern the transportation of hazardous
motor vehicle (e.g. fuel system, air bags, air conditioner,
Equipment that is an integral part of a
vehicle is not considered to be in commerce and, therefore, is
battery) and not being transported on a commercial transport
not subject to the HMR.
For information
of Maryland, we
regarding motor vehicle regulations in the State
suggest you contact the Maryland Department of
Transportation Motor Vehicle Administration at 1-800-248-4160.
I trust this satisfies your inquiry. Please contact us if we can
be of further assistance.
Sincerely,
Hothe z. Athall
Hattie L. Mitchell
Chief, Regulatory Review and Reinvention
Office of Hazardous Materials Standards
HIALIN
010089

<<<PAGE 2>>>

10 ' 01
(TUE) 06:51
NAS
16107746956
PAGE: 1/1
Stevens
Edward Mazzullo
3
171.1
U.S. DOT HAZMAT Standards
Fax #202-366-3012
Applicability
01-0089
I am writing this letter to get clarification as to whether or not I must put a DOT
1070 sticker on my car bumper which has an approved nitrous oxide system
installed. I plan to attend a car show in Ocean City, MD 5/18, 5/19, 5/20/2001 and
was advised by a Mr. Collins, a Maryland State Trooper monitoring this show, that
when travelling through Maryland and while at this show, I must have DOT
stickers on my left front and rear bumpers. When I bought this car in 1999 it was
equipped with an approved NOS system and had a blue federal approval sticker on
the windshield. The system was installed in the car while registered in California
by Dick Landi Industries. The NOS system is bolted to my car and is designed to
enhance performance and appearance (nothing more or nothing less). If California
does not require a bumper sticker, I find it hard to believe that Maryland would
require a sticker for this system. As per our conversation on 4/9/01, please give me
written notification that I can forward to Officer Collins that clearly states that I am
not required by federal law to put NOS bumper stickers on my vehicle while in the
state of Maryland
Thank you for your time and assistance in this matter.
Dave
4/9/01
David C. DeLuca
2320 W. Columbia St.
Allentown, PA 18104
Daytine Phone # 610 821-6289

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2001/010089.pdf>
- Source ID: `phmsa`
- SHA-256: `1bf777ab4bff3722f1f24cabe098617cf846e7f0c61a81ae38c1fb165ef78ec6`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-24T19:54:56.149Z
- Document slug: `phmsa-interpretation-01-0089`

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