# Specification MC-338; insulated cargo tank motor vehicle.

**Citation:** 49 CFR 178.338  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated



## Document text



## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-178.338>
- Source ID: `ecfr`
- SHA-256: `e3839a7d1449b424669721187bdec46b58b40d42dffcd6086adb05ec557293fc`
- Retrieved: 2026-08-20T05:46:20.151Z
- Exported: 2026-08-22T19:57:30.129Z
- Document slug: `49-cfr-178-338`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "178",
  "section": "178.338",
  "subpart": "Subpart J—Specifications for Containers for Motor Vehicle Transportation",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```