# Rules for FM Terrestrial Digital Audio Broadcasting Systems
> **Federal Communications Commission** · Final rule. · Published 2024-10-21 · Effective 2024-11-20 · 89 FR 84096
## Document
- **Document number:** 2024-24105
- **Category:** broadcasting
- **Federal Register citation:** 89 FR 84096
- **CFR reference:** 47 CFR 73
- **Publication date:** 2024-10-21
- **Effective date:** 2024-11-20
- **FCC docket:** MB Docket No. 22-405
## Abstract

In this document, the Federal Communications Commission (Commission) adopts rules to allow digital FM broadcast radio stations to operate with different power levels on the upper and lower digital sidebands, by notification to the Commission. The rule changes will facilitate greater digital FM radio coverage without interfering with adjacent-channel FM broadcast stations. The intended effect is to advance the broader adoption of digital FM broadcasting by authorizing digital FM broadcasters to implement such asymmetric sideband operation by simple notification to the Commission, rather than by requesting experimental authorization as is the current practice.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/10/21/2024-24105/rules-for-fm-terrestrial-digital-audio-broadcasting-systems)
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