Open the manual of nearly any phone, laptop, router, or wireless earbud sold in the United States and you will find a line stating that the device complies with the FCC's rules. That line is not decoration. It reflects a legal precondition: under the Commission's marketing rule, a radio-frequency device generally cannot be sold, leased, imported, or even advertised for sale in the US until it holds an FCC equipment authorization. The rule that establishes this is 47 CFR 2.803, and its general statement is unusually direct.

Section 2.803(b) sets out the prohibition. The Commission's own text reads:

No person may market a radio frequency device unless the radio frequency device is authorized pursuant to a valid FCC equipment authorization that has not been limited through the procedures described in § 2.939(e) of this chapter.— 47 CFR § 2.803(b), source

The definition of "marketing" in that same section is deliberately broad. It includes "sale or lease, or offering for sale or lease, including advertising for sale or lease, or importation, shipment, or distribution for the purpose of selling or leasing." In other words, the authorization requirement attaches well before a unit reaches a buyer; it reaches the act of importing or advertising the device. That breadth is why authorization is a gating step in any consumer-electronics product cycle rather than a final-stage formality.

The two authorization paths

The rules do not impose a single procedure on every device. They scale the rigor of the process to the interference risk the device presents, and the two principal procedures are Certification and the Supplier's Declaration of Conformity.

Certification is the stricter route, defined in 47 CFR 2.907. The regulation describes it as "an equipment authorization approved by the Commission or issued by a Telecommunication Certification Body (TCB) and authorized under the authority of the Commission, based on representations and test data submitted by the applicant." Three features of that definition do the work. First, certification is granted by an external authority — the FCC or an accredited TCB — not by the manufacturer alone. Second, it rests on submitted test data, meaning the device's measured performance is reviewed before a grant issues. Third, by the terms of 2.907(b), the certification "attaches to all units subsequently marketed by the grantee which are identical" to the tested sample, except for changes the Commission permits. Certification is the path used for intentional radiators — transmitters such as the cellular, Wi-Fi, and Bluetooth radios inside a phone — where an error could cause interference to licensed services.

Supplier's Declaration of Conformity (SDoC) is the lighter-touch route, defined in 47 CFR 2.906. The Commission describes SDoC as "a procedure where the responsible party, as defined in § 2.909, makes measurements or completes other procedures found acceptable to the Commission to ensure that the equipment complies with the appropriate technical standards and other applicable requirements." Here the responsible party — typically the manufacturer or US importer — performs or commissions the testing and declares conformity, without a separate grant from the FCC or a TCB. The same section adds a guardrail: under 2.906(a)(1), the equipment testing necessary to show compliance "must not be performed at a measurement facility that is owned by, controlled by, or under the direction of" a party whose independence the rule restricts. SDoC typically covers unintentional radiators — devices that are not designed to transmit but that emit RF energy as a byproduct of digital circuitry, such as many computer peripherals.

Why the distinction matters to a product

The certification-versus-SDoC split explains a pattern any teardown reader will recognize. A device with no radio — a wired peripheral, say — often rides through SDoC, with the manufacturer declaring conformity and labeling accordingly. A device with a transmitter must, as a rule, go through certification, which is why a wireless product carries an FCC ID (the identifier issued with a certification grant) while a purely wired digital device may not. Section 2.907(c) makes the relationship one-directional: equipment otherwise eligible for SDoC may be authorized under certification instead, but the converse is constrained — a device that the rules require to be certified cannot drop down to a self-declaration.

For a consumer, the practical takeaways are concrete. The compliance statement in a product manual is the visible end of this process. An FCC ID printed on a label, or shown electronically on screen, signals that the device went through certification and that a grant exists in the FCC's public database. The absence of authorization is not a paperwork gap; under 2.803 it makes the act of marketing the device unlawful. The Commission built the system so that the question "is this device legal to sell here?" resolves to a documentary answer: a certification grant on file, or a declaration of conformity the responsible party stands behind — recorded, dated, and tied to a specific tested configuration rather than to a marketing claim.

The third path, and why the system scales

Certification and SDoC are the two paths that dominate consumer electronics, but the rules also recognize that some equipment needs no authorization procedure at all. The broader authorization framework in Part 2, Subpart J distinguishes devices that must be certified, devices eligible for SDoC, and devices that are exempt from an equipment-authorization procedure entirely because they present negligible interference potential. The structure is a graduated one: the more a device transmits and the higher its potential to disrupt licensed services, the more external scrutiny the rules demand before it can be marketed. A purely incidental radiator with no digital timing circuitry sits at one end; a multi-band cellular transmitter sits at the other, carrying the full weight of certification, test exhibits, and a grant on file. This scaling is the reason a single regulatory regime can govern everything from a wired lamp to a 5G handset without applying the same burden to each. The authorization requirement is not a flat tax on all electronics; it is calibrated to interference risk, which is why the visible evidence — an FCC ID here, a declaration there, nothing at all on a truly exempt device — varies so much across the gadgets in a single household, even though all of them passed through the same statutory framework before they could lawfully be sold.