# Designation of Areas for Air Quality Planning Purposes
> **Rule** · — · Published 2006-02-07 · 71 FR 6208
## Document
- **Document number:** 06-55505
- **Category:** air-emissions
- **Federal Register citation:** 71 FR 6208
- **CFR reference:** 40 CFR 81
- **Publication date:** 2006-02-07
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/02/07/06-55505/designation-of-areas-for-air-quality-planning-purposes)
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