Conn. Gen. Stat. § 14-21c: Number plates for manufacturers of motor vehicles or automotive equipment.

(a) Upon the application of a person engaged in the manufacturing of motor vehicles or automotive equipment, the commissioner may issue interchangeable special number plates for motor vehicles used by the manufacturer in the experimental testing of such motor vehicles or automotive equipment, provided the application shall contain (1) information on the motor vehicle or motor vehicle parts manufactured, (2) a statement on the need for highway testing, (3) an affidavit stating that the special plates shall be used only in experimental testing, and (4) any other information the commissioner deems pertinent.

(b) The commissioner shall charge an annual fee of seventy dollars for the issuance of registration and plates for any such experimental test motor vehicle. Such registration shall expire one year following the date of issuance and shall not be renewed.

(c) No registration and marker plate shall be issued pursuant to this section unless the applicant has furnished financial responsibility satisfactory to the commissioner as defined in section 14-112.