# Mixing of fissile material packages with non-fissile or fissile-excepted material packages.

**Citation:** 49 CFR 173.459  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

Mixing of fissile material packages with other types of Class 7 (radioactive) materials in any conveyance or storage location is authorized only if the TI of any single package does not exceed 10, the CSI of any single package does not exceed 50, and the provisions of §§ 173.441 and 173.457 are sati

## Document text

Mixing of fissile material packages with other types of Class 7 (radioactive) materials in any conveyance or storage location is authorized only if the TI of any single package does not exceed 10, the CSI of any single package does not exceed 50, and the provisions of §§ 173.441 and 173.457 are satisfied.

[69 FR 3692, Jan. 26, 2004]

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-173.459>
- Source ID: `ecfr`
- SHA-256: `49bc68121d101571be23989b3c5cc49b92da9bb44fccbfac2333fb8dcc7e1f1c`
- Retrieved: 2026-08-20T05:46:04.092Z
- Exported: 2026-08-24T07:50:30.357Z
- Document slug: `49-cfr-173-459`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "173",
  "section": "173.459",
  "subpart": "Subpart I—Class 7 (Radioactive) Materials",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```