# Authorization to offer and transport explosives.

**Citation:** 49 CFR 173.51  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

(a) Unless otherwise provided in this subpart, no person may offer for transportation or transport an explosive, unless it has been tested and classed and approved by the Associate Administrator (§ 173.56).

(b) Reports of explosives approved by the Department of Defense or the Department of Energy 

## Document text

(a) Unless otherwise provided in this subpart, no person may offer for transportation or transport an explosive, unless it has been tested and classed and approved by the Associate Administrator (§ 173.56).

(b) Reports of explosives approved by the Department of Defense or the Department of Energy must be filed with, and receive acknowledgement in writing by, the Associate Administrator prior to such explosives being offered for transportation.

[Amdt. 173-224, 55 FR 52617, Dec. 21, 1990, as amended by 66 FR 45379, Aug. 28, 2001]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-173.51>
- Source ID: `ecfr`
- SHA-256: `4811eea2e2ae096d28023a636098d65862352ee085cf4a4f1f67b4e90a6722e4`
- Retrieved: 2026-08-20T05:46:04.092Z
- Exported: 2026-08-24T02:54:32.302Z
- Document slug: `49-cfr-173-51`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "173",
  "section": "173.51",
  "subpart": "Subpart C—Definitions, Classification and Packaging for Class 1",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```