# Service equipment; protection systems.

- **operation:** document
- **citation:** 49 CFR 179.20
- **title:** Service equipment; protection systems.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** If an applicable tank car specification authorizes location of filling or discharge connections in the bottom shell, the connections must be designed, constructed, and protected according to paragraphs E9.00 and E10.00 of the AAR Specifications for Tank Cars (IBR, see § 171.7 of this subchapter).

[
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/49-cfr-179-20.json
- **markdown:** https://regulus.evalyn.ai/document/49-cfr-179-20.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-179-20
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-179.20
**body:**

If an applicable tank car specification authorizes location of filling or discharge connections in the bottom shell, the connections must be designed, constructed, and protected according to paragraphs E9.00 and E10.00 of the AAR Specifications for Tank Cars (IBR, see § 171.7 of this subchapter).

[68 FR 75759, Dec. 31, 2003]
- **truncated:** false
- **body characters:** 327