Part XIII - Office of Conservation-Pipeline Safety
- Subpart 1 - General Provisions (§§ XIII-101 — XIII-111)
- Subpart 2 - Transportation of Natural Gas and Other Gas by Pipeline; Annual Incident and Other Reporting [49 CFR Part 191] (§§ XIII-301 — XIII-401)
- Subpart 3 - Transportation of Natural Gas or Other Gas by Pipeline: Minimum Safety Standards [49 CFR Part 192] (§§ XIII-501 — XIII-5111)
- Subpart 4 - Drug and Alcohol Testing (§§ XIII-6101 — XIII-6545)
- Subpart 5 - Liquefied Natural Gas Facilities: Federal Safety Standards (§§ XIII-6701 — XIII-8517)