# Approval and Promulgation of Implementation Plans
> **Rule** · — · Published 2018-05-31 · 83 FR 24940
## Document
- **Document number:** 2018-11702
- **Category:** other
- **Federal Register citation:** 83 FR 24940
- **CFR reference:** 40 CFR 52
- **Publication date:** 2018-05-31
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/05/31/2018-11702/approval-and-promulgation-of-implementation-plans)
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