Conn. Agencies Regs. § 14-36f-10
The department shall use its inspection lanes to inspect each motor vehicle designated for behind-the-wheel instruction to verify its fitness for use and that the required safety equipment is installed prior to any behind-the-wheel instruction or driver testing. Thereafter, the department shall inspect all motor vehicles on an annual basis using the department's inspection lanes. Upon passing inspection, the commissioner may affix an inspection decal to the windshield of each vehicle showing the inspection series or record the results of such inspection in such manner prescribed by the commissioner. No motor vehicle shall be used for driver education or driver testing unless the motor vehicle has passed the required inspection by the department. A secondary school shall keep maintenance records for each motor vehicle used for driver education or testing, and such records shall be made available to the commissioner or other law enforcement officer during school business hours. The commissioner or other law enforcement officer may make random inspections or audits, or both, of any vehicle used for student instruction at any reasonable time.
Conn. Agencies Regs. § 14-36f-10