Cb?

Do any of you guys remember when you had to have an FCC license to operate a CB? They discontinued CB licenses in 1976 or 77. Prior to that, if you were stopped and had a CB radio in the car, you were supposed to have an FCC license for it. My call sign was KBJT5218.
As I recall, the law stated that if the CB radio was powered by the car's battery, you had to have a license to use it. I always supposed that to me that a CB that was self contained didn't require an operators license, but back then, I never saw a self contained CB.