# Requirements for Preparation, Adoption, and Submittal of Implementation Plans
> **Rule** · — · Published 2011-04-06 · 76 FR 18870
## Document
- **Document number:** 2011-8334
- **Category:** other
- **Federal Register citation:** 76 FR 18870
- **CFR reference:** 40 CFR 51
- **Publication date:** 2011-04-06
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/04/06/2011-8334/requirements-for-preparation-adoption-and-submittal-of-implementation-plans)
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