# Rocketflite — Hazardous Materials Safety Interpretation

**Citation:** 98-0268  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1999-04-13

98-0268 response to Rocketflite concerning 173.22.

## Document text

<<<PAGE 1>>>

This letter is not publically available as it contains confidential information protected in
accordance with 49 CFR § 105.30

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/1998/980268.pdf>
- Source ID: `phmsa`
- SHA-256: `7eb30118b8bffca2fab61ff7334e2c12e3612ddd0dceb6d5fac3c523870109d0`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T05:51:01.286Z
- Document slug: `phmsa-interpretation-98-0268`

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```