# Air Plan Approval; Massachusetts; Revised Format for Materials Being Incorporated by Reference
> **Rule** · Final rule; administrative change. · Published 2018-01-29 · Effective 2018-01-29 · 83 FR 3965
## Document
- **Document number:** 2018-01513
- **Category:** other
- **Federal Register citation:** 83 FR 3965
- **CFR reference:** 40 CFR 52
- **Publication date:** 2018-01-29
- **Effective date:** 2018-01-29
- **State:** MA
- **EPA docket:** EPA-R01-OAR-2017-0107
## Abstract

The Environmental Protection Agency (EPA) is revising the format for materials submitted by the Commonwealth of Massachusetts that are incorporated by reference (IBR) into the Massachusetts State Implementation Plan (SIP). The regulations and other materials affected by this format change have all been previously submitted by Massachusetts and approved by EPA as part of the SIP.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/01/29/2018-01513/air-plan-approval-massachusetts-revised-format-for-materials-being-incorporated-by-reference)
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