Had to look up what SR22 insurance was: An SR-22 is a certificate of financial responsibility required for some drivers by their state or court order. An SR-22 is not an actual "type" of insurance, but a form filed with your state. This form serves as proof that your auto insurance policy meets the minimum liability coverage required by state law.

This seems like a process the state would impose if other means had failed. I am guessing that this sovcit has previous offences like this and refused to comply.