# Regulus search export

- Query: `61 FR 37016`
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- Exported: 2026-08-25T19:05:21.796Z

## 1. Use of certified laboratories.

**Citation:** 49 CFR 40.39  
**Type / status:** regulation / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective / published:** 2000-10-01 / Not stated

(a) Except as provided in paragraph (b) of this section, employers subject to this part shall use only laboratories certified under the DHHS “Mandatory Guidelines for Federal Workplace Drug Testing Programs,” April 11, 1988, and subsequent amendments thereto. (b) Employers subject to this part may 

### Provenance

- Official: Yes
- Source: <https://www.govinfo.gov/app/details/CFR-2000-title49-vol1/CFR-2000-title49-vol1-sec40-39>
- Source ID: `govinfo-cfr`
- SHA-256: `0f9ba1adccd9362603f810a851748c8b012271dcadbbf006e75b7a8ff931dd4f`
- Retrieved: 2026-08-12T01:41:24.490Z
- Document slug: `49-cfr-40-39`
- Related records: 6