FCC, but you can go a lot further with a LRS.
1.3GHz, 433MHz, 2.5GHz, 5.78GHz, 900MHz, (27MHz 35MHZ 72MHz old, low power systems)
It is not impossible to get 12 miles from 2.4GHz, but most systems are able to get 2-4 miles. With 433MHz it is very possible to get 60 miles.