20 ILCS 1805/10

The uniforms, arms and equipment of all personnel of the Illinois National Guard shall be exempt from all suits, distresses, executions or sales for debts or payment of taxes. Personnel shall in all cases except treason, felony, or breach of peace, be privileged from arrest and imprisonment by civil authority while under orders in the active service of the State, from the date of the issuing of such orders to the time when such service shall cease.