# To whom does the MRO transmit reports of drug test results?

**Citation:** 49 CFR 40.165  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

(a) As the MRO, you must report all drug test results to the DER, except in the circumstances provided for in § 40.345.

(b) If the employer elects to receive reports of results through a C/TPA, acting as an intermediary as provided in § 40.345, you must report the results through the designated C/T

## Document text

(a) As the MRO, you must report all drug test results to the DER, except in the circumstances provided for in § 40.345.

(b) If the employer elects to receive reports of results through a C/TPA, acting as an intermediary as provided in § 40.345, you must report the results through the designated C/TPA.

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-40.165>
- Source ID: `ecfr`
- SHA-256: `53b06af4cf7c795f904aad52b266f49beb0524b715866bfb98c1c5f1b67b2811`
- Retrieved: 2026-08-20T05:54:21.729Z
- Exported: 2026-08-23T02:24:01.883Z
- Document slug: `49-cfr-40-165`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "40",
  "section": "40.165",
  "subpart": "Subpart G—Medical Review Officers and the Verification Process",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```