# United States Postal Service — Hazardous Materials Safety Interpretation

**Citation:** 14-0073  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2014-09-22

14-0073 response to United States Postal Service concerning 173.21, 173.308.

## Document text

14-0073. Organizations: United States Postal Service. Recipients: Ms. Joan Hall. Cataloged sections: 173.21, 173.308. The catalog exposes only a linked correspondent attachment; no agency response body is mirrored or indexed.

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/node/69951>
- Source ID: `phmsa`
- SHA-256: `ff9fea2558748826d9f60b989fed4e3300dd5ac6d1ebc005bb136b354ff7e1db`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T09:44:29.125Z
- Document slug: `phmsa-interpretation-14-0073`

### Source metadata

```json
{
  "materialSubtype": "interpretation",
  "interpretationArea": "hazardous_materials",
  "representation": "catalog_metadata_with_link_only_correspondent_attachment",
  "companies": [
    "United States Postal Service"
  ],
  "individuals": [
    "Ms. Joan Hall"
  ],
  "refIds": [
    "14-0073"
  ],
  "catalogDates": [
    "2014-09-22"
  ],
  "catalogParts": [
    173
  ],
  "catalogRowCount": 2,
  "sourceRecordUrls": [
    "https://www.phmsa.dot.gov/node/69951"
  ],
  "linkedAttachmentUrls": [
    "https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2014/attachments_013450_original_140073.pdf"
  ],
  "unavailableResponseUrls": [],
  "duplicateRepresentationUrls": [],
  "citedSections": [
    "173.21",
    "173.308"
  ],
  "catalogPageUrls": [
    "https://www.phmsa.dot.gov/regulations/title49/section/17321",
    "https://www.phmsa.dot.gov/regulations/title49/section/173308"
  ],
  "pdfUrls": [],
  "representations": [],
  "caveat": "Interpretations apply regulations to the facts presented and do not create independently enforceable requirements.",
  "jurisdiction": "US"
}
```