FCC registration and licensee consent for your BDA

A public safety BDA rebroadcasts radio channels that are licensed to a public safety agency, such as your county's fire and police radio system. The FCC allows a non-licensee, "such as a building owner or a signal booster installation contractor," to operate a booster on those channels only with the licensee's consent (47 CFR 90.219(b)(1)).

The rule: "Non-licensees seeking to operate signal boosters must obtain the express consent of the licensee(s) of the frequencies for which the device or system is intended to amplify. The consent must be maintained in a recordable format that can be presented to an FCC representative or other relevant licensee investigating interference" (47 CFR 90.219(b)(1)(i)).

What that means for you:

• Get it in writing before the system is turned on. NFPA 1225 requires "written authorization by the frequency license holder" at initial installation and before activation (18.7.2), and the design must be approved by both the AHJ and the license holder (18.2.1).
• Florida repeats it in statute. "Any modification to an existing system or any installation of a new system must have the express consent of the frequency licenseholder" (F.S. 633.202(18)(d)). A modification needs consent too, not just a new install.
• Keep it where the next manager can find it. The consent has to be producible if anyone investigates interference.

Different agencies call the document different things. Miami-Dade's test checklist asks for a "Re-transmission agreement for the 800mhz system" with the acceptance test documents.

Both classes are limited to 5 watts ERP per retransmitted channel (90.219(d)(3)(i)) and may only improve coverage in weak signal areas, never extend the agency's normal range (90.219(d)(1), (2)).

From the FCC's 2014 instructions (DA 14-15):

1. Log in to the Part 90 Signal Booster Registration and Discovery page with an FCC Registration Number (FRN) and password.
2. Enter the booster's location, either latitude and longitude or street address, and confirm it on the map.
3. Check the frequencies within the booster's operating range and enter at least one call sign associated with it.
4. Enter company and contact information and a signature (title and name).
5. Submit. The system issues a confirmation with a booster ID number. Each booster is registered separately.

Timing: existing Class B boosters had to be registered by November 1, 2014, and "any new Class B signal booster installed after November 1, 2014 must be registered prior to operation" (DA 14-15).

Who files: the notice is addressed to "Part 90 licensees and signal booster operators," and the rule defines operating a booster as maintaining "operational control over, and responsibility for the proper functioning of" it (90.219(a)). The rule does not say whether the owner or the installer files. Whoever files, get a copy of the confirmation with the booster ID, because fire marshals ask for it. Miami-Dade, for example, requires "Proof of the Part 90 800mhz Class B Signal Booster registration form" with the acceptance test request.

Since March 1, 2014, every Part 90 booster must carry this advisory on the device, the packaging, the manual and online listings (47 CFR 90.219(e)(5)):

"WARNING. This is NOT a CONSUMER device. It is designed for installation by FCC LICENSEES and QUALIFIED INSTALLERS. You MUST have an FCC LICENSE or express consent of an FCC Licensee to operate this device. You MUST register Class B signal boosters (as defined in 47 CFR 90.219) online at www.fcc.gov/signal-boosters/registration. Unauthorized use may result in significant forfeiture penalties, including penalties in excess of $100,000 for each continuing violation."

Booster operation is "on a non-interference basis and operations may be required to cease or alter the operating parameters due to a request from an FCC representative or a licensee's request to resolve interference" (90.219(b)(1)(ii)). The FCC may also require more attenuation or filtering (90.219(d)(6)). This is one reason the annual test includes a check for oscillation, a known source of interference. Miami-Dade requires oscillation alarms and shutdown features that are "intended to minimize interference due to oscillation of the signal booster(s)." See annual BDA testing.

In September 2025 the FCC asked for public comment on a petition from the Safer Buildings Coalition (RM-12009). The petition says poorly designed or deployed boosters cause interference to public safety radio, and it asks the FCC to set clear procedures for requesting and tracking licensee consent, to require registration of both Class A and Class B boosters, and to update labeling. The FCC also asked whether boosters should be required to monitor themselves and shut down if improperly installed (DA 25-853). Comments were due October 16, 2025 and replies October 31, 2025. As of our verification date we had not confirmed a final rule; we will log any change in the changelog.

• The frequency license holder's written consent or retransmission agreement.
• The FCC registration confirmation with booster ID, for each Class B booster.
• The equipment label photo or data sheet showing Class A or B.
• The permit, acceptance test report and every annual report.

Our inspection checklist has a section for these. Confirm what your fire marshal (AHJ) wants on file.