# Modification of Control Areas 1143L and 1146L
> **Rule** · Final rule. · Published 2004-12-07 · 69 FR 70542
## Document
- **Document number:** 04-26845
- **Category:** other
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 69 FR 70542
- **Publication date:** 2004-12-07
- **FAA docket:** Docket No. FAA-2004-19671
## Abstract

This action revises the legal descriptions of Control Areas 1143L and 1146L to remove references to the Nantucket, MA, Nondirectional Beacon (NDB), which has been taken out of service and decommissioned by the FAA. The legal descriptions are being revised to use a geographical point based on latitude/longitude coordinates in place of the former NDB references. This action will enhance safety by removing references to a decommissioned navigational aid from controlled airspace descriptions.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/12/07/04-26845/modification-of-control-areas-1143l-and-1146l)
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