Back in the late 70s or so, the FCC required a license for CB radio operators.I myself acquired one; the official application form was included in the package with every CB radio.
Eventually the requirement was lifted, mainly because there was no way to enforce it in the face of the bazillions of CBers who did not care to apply.
I am curious as to what happened to the information that was provided to the FCC by those of us who were loyal Americans.