# Modification of Restricted Areas R-4201A and R-4201B; Camp Grayling, MI
> **Rule** · Final rule. · Published 2024-06-18 · Effective 2024-09-05 · 89 FR 51414
## Document
- **Document number:** 2024-13313
- **Category:** other
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 89 FR 51414
- **Publication date:** 2024-06-18
- **Effective date:** 2024-09-05
- **FAA docket:** Docket No. FAA-2023-1972
## Abstract

This action modifies the designated altitudes of restricted area R-4201B, Camp Grayling, MI, by raising the restricted area ceiling from 9,000 feet mean sea level (MSL) to 23,000 feet MSL to match the ceiling of the adjacent restricted area R-4201A, Camp Grayling, MI. Additionally, this action adds a "tie-in" boundary point in the R- 4201A boundaries description to ensure a shared R-4201A and R-4201B boundary. Lastly, this action makes minor administrative changes to the R-4201B time of designation information and the R-4201A and R-4201B using agency information to standardize the format of the information provided describing these restricted areas.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/06/18/2024-13313/modification-of-restricted-areas-r-4201a-and-r-4201b-camp-grayling-mi)
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