Every agency, board, commission, branch or department of this State or controlled by officers of this State, possessing, operating or controlling vehicles shall ensure that such vehicles are properly identified by affixing the special registration plate or digital registration plate . Such agencies, boards, commissions, branches and departments shall arrange for the replacement of missing registration plates or digital registration plates when necessary in order that vehicles at all times be clearly identified as belonging to the State of Illinois.
30 ILCS 610/3