# Hazardous Materials: Revision of Requirements for Emergency Response Telephone Numbers
> **Pipeline and Hazardous Materials Safety Administration** · Rule · Published 2009-10-22 · 74 FR 54489
## Document
- **Document number:** Z9-24799
- **Category:** hazmat
- **Sub-agency:** Pipeline and Hazardous Materials Safety Administration
- **Federal Register citation:** 74 FR 54489
- **CFR reference:** 49 CFR 172
- **Publication date:** 2009-10-22
- **DOT docket:** RSPA Docket No. 2006-26322 (HM-206F)
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/10/22/Z9-24799/hazardous-materials-revision-of-requirements-for-emergency-response-telephone-numbers)
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