What states are NOT in the UCR plan?
Nine states do not participate as base states under UCR: Arizona, Florida, Hawaii, Nevada, New Jersey, Oregon, Vermont, Wyoming, and the District of Columbia. Carriers based in these states route their UCR registration through the nearest participating state. The receipt is valid in all 50 states regardless of base.
The 41 participating states + DC plus the 9 non-participating states make up the UCR plan. Non-participating states do not collect UCR fees from carriers based there but their carriers still need to register (through a participating state of their choice).
Non-participating states: Arizona, Florida, Hawaii, Nevada, New Jersey, Oregon, Vermont, Wyoming, and the District of Columbia. A few additional states (Maryland, Maine, Massachusetts, New Hampshire, Oklahoma, Rhode Island) have variable participation — historically they have been listed in different rosters; check the current UCR plan for definitive status.
For a Florida-based carrier: UCR registration routes through Georgia, South Carolina, or another nearby participating state. The fee structure is the same as any other base state. The receipt is valid for operation in all 50 states.
Operating in a non-participating state does not require UCR enforcement — those states don't check at roadside as part of UCR. Operating in a participating state without current UCR exposes the carrier to enforcement (OOS orders, fines).