Conn. Gen. Stat. § 14-13: Registration certificate and insurance identification card to be carried in vehicle.

(a) The certificate of registration and any automobile insurance identification card for the vehicle issued pursuant to section 38a-364 shall be carried in the motor vehicle at all times when it is being operated on a public highway, except as otherwise provided by statute. If a vehicle is registered in the name of a lessor licensed under section 14-15, a legible photostatic copy of the certificate of registration or a rental or lease contract which shall include the vehicle identification number of such vehicle registered in this state may be carried in lieu of the original certificate, provided the original certificate shall be available at all times for inspection at the lessor's usual place of business in the state if the motor vehicle is registered in this state. If a vehicle is registered as a school bus as defined in section 14-275, such copy may be carried in lieu of the original certificate, provided such certificate shall be available at all times for inspection at the school bus owner's usual place of business in the state.

(b) Any person who violates any provision of this section shall be deemed to have committed an infraction and be fined fifty dollars.