# Mr. Paul Reamy — Hazardous Materials Safety Interpretation

**Citation:** 04-0284  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2005-02-28

04-0284 concerning 173.448, 175.700.

## Document text

<<<PAGE 1>>>

.S. Depanmen
of Transportation
400 Seventh St., S.W.
Washington, D.C. 20590
Special Programs
Research and
Administration
FEB 28 2005
Mr. Paul Reamy
Ref. No. 04-0284
504 Misty Lane
N. Fort Myers, FL 33903
Dear Mr. Reamy:
This responds to your December 7, 2004 letter requesting clarification on transporting Class
7 radioactive materials under the Hazardous Materials Regulations (HMR; 49 CFR Parts
171-180). Specifically, you ask how to properly ship Class 7 radioactive materials that are
not intended for use in or incident to, research, medical diagnosis or treatment by passenger
aircraft under the HMR.
As your letter notes, radioactive materials that do not exceed a transport index or criticality
safety index of 3.0 and intended for use in or incident to research, medical diagnosis, or
treatment may be transported on board passenger-carrying aircraft in accordance with
§§ 173.448(f) and 175.700(c).
However, § 175.700(c) does provide exceptions for the radioactive materials that are shipped
in accordance with §§ 173.4, 173.422 and 173.423. Radioactive materials that are packaged
in accordance with §§ 173.4, 173.422, or 173.423 may be shipped by passenger carrying
aircraft, and are not subject to any other requirements of the HMR, including §§ 173.448(f)
and 175.700(c).
I hope this answers your inquiry.
Sincerely,
Chief, Standards Development
Office of Hazardous Materials Standards
173.448
175.700
040284

<<<PAGE 2>>>

Boothe
December 7, 2004
5173.448
Mr. Edward T. Mazullo, Director
$175,700
Office of Hazardous Materials Standards, DHM 10
400 7* Street SW
Research and Special Programs Administration
RAM
04-0284
Washington, DC 20590
Dear Ed;
This correspondence is in relation to 49 CFR 173.448 and 49 CFR 175.700.
Section 173.448(f) clearly states that "no person shall offer for transportation or transport
intended for use in, or incident to research, medical diagnosis or treatment".
aboard a passenger aircraft any Class 7 (radioactive) material unless that material is
Section 49 CFR 175.700 © contains the exact same language except that if the material is
packaged in accordance with 49 CFR 173.4, 173.422 and 173.423 the air carrier may
transport the Class 7 (radioactive) material on a passenger aircraft.
Please note that section 173.448(f) does not provide for the same packaging exceptions as
does 175.700 C.
My first question is, how does the shipper of the Class 7 (radioactive) material offer a
Class 7 (radioactive) material to a carrier that is OTHER THAN a Class 7(radioactive)
material that is intended for use in, or incident to, research, medical diagnosis or
treatment? Example: Exit signs for aircraft from the manufacturer to the user.
My second question relates to 49 CFR 173.422 (b).
It the shipper of the same Class 7 (radioactive) material, packages the Class 7
radioactive material in accordance with 173.422(b), is the shipment then only subject t
73.422(b)(1-3) and therefore would not be subject to 173.448 (for any other part o
subchapter C and may be offered and transported on a passenger aircraft?
A prompt response to this matter would be greatly appreciated.
Ed, we did survive 4 hurricanes and we are still putting things back together. But we are
safe.
A Merry Christmas to you and your entire staff.
Paul Reamy
504 Misty Lane
N. Fort Myers, Florida 33903
(239) 656 7005 or (239) 426 1657

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2004/040284.pdf>
- Source ID: `phmsa`
- SHA-256: `9f9e1ed3b3c05926a05954851c3fc8801655c53a23cce2c52801b8c040c3cba7`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T19:26:01.433Z
- Document slug: `phmsa-interpretation-04-0284`

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