Whether the FCC unlawfully abandoned its longstanding policy requiring unlicensed devices to cease operations when they cause harmful interference to licensed radio users.
Holding
No. The FCC permissibly applied its existing definition of harmful interference and did not abandon its shutdown policy.
Reasoning
Section 301 generally requires licenses for radio transmitters, while section 302 authorizes the FCC to regulate devices capable of emitting radio-frequency energy that may cause harmful interference. Under Part 15, an unlicensed device may not cause harmful interference and must cease operation if it does cause such interference. The court deferred to the FCC’s reasonable interpretation of this statutory and regulatory framework.
The FCC concluded that, after a required 20 dB power reduction or frequency notch, interference to mobile amateur-radio operations would not seriously degrade, obstruct, or repeatedly interrupt service. Because such residual interference would not qualify as “harmful interference” under the Part 15 definition, the shutdown requirement would not be triggered. This was an application of the established standard to a new technology, not an unacknowledged change in policy.
The FCC’s observation that mobile operators can reposition their radios did not shift a new legal burden onto them. Rather, it reflected the practical nature of mobile use and the FCC’s technical finding that BPL interference would be confined to relatively short distances from the power lines. The court also rejected ARRL’s claim that the FCC had displaced section 301 with section 302; the FCC was regulating BPL under Part 15 and applying section 302’s public-interest authority without disclaiming section 301.