---
kind: "section"
citation: "47 C.F.R. § 73.403"
title: "47"
number: "73.403"
heading: "Digital audio broadcasting service requirements."
url: "https://uscodex.org/cfr/47/73.403"
---

# §73.403. Digital audio broadcasting service requirements.

- (a) Broadcast radio stations using IBOC must transmit at least one over-the-air digital audio programming stream at no direct charge to listeners. In addition, a hybrid broadcast radio station must simulcast its analog audio programming on one of its digital audio programming streams. The DAB audio programming stream that is provided pursuant to this [paragraph (a)](#a) must be at least comparable in sound quality with a standard analog broadcast.
- (b) **Emergency information.** The emergency information requirements found in [§ 73.1250](/cfr/47/73.1250.md) shall apply to all free DAB programming streams.

## Notes

### Amendments

[72 FR 45692, Aug. 15, 2007, as amended at 85 FR 78027, Dec. 3, 2020]

### Source

Source: 72 FR 45692, Aug. 15, 2007, unless otherwise noted.

### Authority

Authority: 47 U.S.C. 154, 155, 301, 303, 307, 309, 310, 334, 336, 339.

### Amendments

[72 FR 45692, Aug. 15, 2007, as amended at 85 FR 78027, Dec. 3, 2020]