Comment by ddtaylor

47 CFR Part 2 and Part 15

FCC devices are certified / allowed to use a spectrum, but you must maintain compliance. If you're a mobile phone manufacturer you have to be certain that if a bug occurs, the devices don't start becoming wifi jammers or anything like that.

This means you need to be able to push firmware updates over the air (OTA). These must be signed to avoid just anyone to push out such an OTA.

The government has a history of compelling companies to push out signed updates.