FCC Spectrum Licensing and Equipment Rules (Parts 15, 22, 24, 27)

Issuing body / enforcer: U.S. Federal Communications Commission (FCC) — Wireless Telecommunications Bureau (licensing), Office of Engineering and Technology (equipment authorization), Enforcement Bureau. Jurisdiction: United States — spectrum use, station licensing, and equipment marketing/operation in the U.S.

1. What it is

This is the U.S. licensed-spectrum regime that sits alongside Part 15's unlicensed rules (covered in the shared FCC Part 15 brief): the FCC grants exclusive or shared rights to use specific bands through auctions, licensing, and rule-based services, and separately requires equipment authorization for the transmitters that operate in them. The Parts in the catalogue record map to the major commercial wireless services:

Part 22 — Public Mobile Services (legacy cellular, paging, rural radiotelephone).
Part 24 — Personal Communications Services (PCS, 1850–1990 MHz — the original U.S. 2G/3G/4G/5G band).
Part 27 — Miscellaneous Wireless Communications Services — the flexible-use workhorse: AWS, WCS, 600 MHz, 3.5 GHz CBRS-adjacent, 3.45 GHz, and the 3.7–3.98 GHz C-band that carries much of U.S. 5G.
Part 15 (unlicensed) is the companion: Wi-Fi, Bluetooth, and other unlicensed devices operate here without individual licences but with equipment authorization.

2. Scope, triggers, thresholds

Licensed operation requires a spectrum right: auctioned licenses (geographic areas, 10–15 year terms with renewal expectancy conditioned on buildout), or rule-based access (e.g., CBRS three-tier sharing in 3.55–3.7 GHz under Part 96, General Authorized Access).
Licensee obligations: construction/coverage benchmarks ("substantial service" showings), spectrum-leasing rules, partition/disaggregation options, and secondary-market transactions — all with FCC approval mechanics.
Equipment authorization: transmitters for licensed services need Certification (grants via TCBs), tested to ANSI C63.26 and service-specific rules (power limits, out-of-band emissions, frequency stability per part).
Major recent auctions shaping the current band plan: C-band (Auction 107, 2021, ~$81B), 3.45 GHz (Auction 110, 2022), 2.5 GHz (Auction 108, 2022) — [Flag: auction figures as widely reported.]
Trigger: operating a transmitter in a licensed band (needs a licence or a lease from one), or manufacturing/importing/marketing licensed-band equipment (needs certification).

3. Key requirements and compliance obligations

Hold or lease the spectrum right before transmitting — "spectrum squatting" on fallow licensed spectrum is unlawful.
Meet buildout benchmarks or risk license termination/non-renewal; document substantial service.
Certify equipment for the specific part and band (a Part 27 C-band radio needs its own grant; a Part 15 grant does not cover licensed operation).
RF exposure and environmental compliance (NEPA, historic preservation, tribal consultation for towers — the "tower siting" process under Parts 1/17).
Interference protection: licensed services get interference protection; unlicensed Part 15 devices must accept any interference and cause none (15.5).
Supply-chain rules (2025–2026): the Covered List equipment-authorization prohibitions (see the shared FCC Part 15 brief) apply to licensed-service equipment too — covered modules and logic-bearing components from Covered List entities cannot be authorized.

4. Penalties and consequences

Forfeitures for unlicensed operation or marketing unauthorized equipment (base forfeiture ~$10,000 for unlicensed operation; statutory maxima in the six figures per violation per day, inflation-adjusted — [Flag: confirm current figures]).
License revocation, non-renewal, and buildout forfeiture — the existential penalties for carriers.
Equipment seizure and import denial at CBP for unauthorized gear.

5. Version status and live changes (verified 2026-09-30)

Supply-chain transformation (2025–2026): the Second R&O (Oct 2025), Third R&O (July 2026), and Third FNPRM (Aug 2026) reshape equipment authorization around Covered List entities — including the ban on authorizing end products with Covered List-produced logic-bearing hardware components and proposed U.S.-based liable-party requirements for certification applicants. This affects base-station, CPE, and handset supply chains directly.
Covered List additions (Dec 2025–Jan 2026): foreign-produced drones/UAS and components; DJI/Autel and affiliates — relevant to Part 15 and licensed-band drone communications alike.
KDB 940660 update (Dec 2025): CBRS/LTE Band 48 equipment-class changes — check current text for 3.5 GHz products.
Auction/assignment pipeline: no major new spectrum auction completed in the verification window identified — [Flag: the FCC's auction authority lapsed in March 2023 and its restoration status should be confirmed before advising on auction timelines.]

FCC GROL (Telecom/RF flagship): the individual operator license covering FCC rules, radio law, and operating practice — directly relevant to engineers working with licensed services.
FCC Amateur Radio licenses (Telecom/RF flagship): teach the licensing/allocation structure from the operator side.
iNARTE EMC Engineer (Telecom/RF flagship): for the emissions/coexistence engineering of licensed-band transmitters.
Note: spectrum licenses are held by companies, not individuals; GROL/amateur tickets are operator qualifications, not spectrum rights.

7. Practical notes

Never conflate the equipment grant with the operating right: a certified Part 27 radio still needs a licensee's authorization to transmit, and a spectrum license does not excuse uncertified equipment.
Screen the full bill of materials against the Covered List posture before committing to a radio design — the 2026 logic-bearing-component rule reaches into subassemblies, not just finished radios.
Buildout milestones are calendar obligations: diary them at license acquisition, not at network launch.

Original ETS reference writing, verified against public sources on 2026-09-30. Thin sourcing is flagged inline. Not legal advice — confirm current editions with the issuing body.

FCC Spectrum Licensing and Equipment Rules (Parts 15, 22, 24, 27)