You may be questioned about UCR registration in a roadside inspection.
The UCR registration is an annual fee and filing made by every motor carrier every year; it registers the carrier and its drivers with every state in the continental United States and pays annual state fees.
There is no printed evidence of this registration in your legalization, as the record-keeping is all electronic.
State Patrolmen will ask you for the MTI DOT number [ 753560 ] and will pull it up in their computer to find verification that the filing has been done.