# Regulus search export

- Query: `71 FR 47`
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- Exported: 2026-08-24T00:16:29.884Z

## 1. NTSB Safety Recommendation P-99-012

**Citation:** P-99-012  
**Type / status:** guidance / guidance  
**Agency:** National Transportation Safety Board  
**Effective / published:** 1999-06-01 / 1999-06-01

TO THE PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION (ORIGINALLY ISSUED TO RSPA): Establish within 2 years scientifically based hours-of-service regulations that set limits on hours of service, provide predictable work and rest schedules, and consider circadian rhythms and human sleep and rest requirements.

### Provenance

- Official: Yes
- Source: <https://data.ntsb.gov/carol-main-public/sr-details/P-99-012>
- Source ID: `ntsb-pipeline`
- SHA-256: `5697b13bc02e3998e763a8b24d6c8e02a4bfc89fdce9dab7d4f41ef192c9bb6a`
- Retrieved: 2026-08-20T04:57:24.741Z
- Document slug: `ntsb-recommendation-p-99-012`
- Related records: 4