R.I. Gen. Laws § 31-23.3-3: Rules and regulations authorized — Administrator of the division of motor vehicles.

(a) The administrator of the division of motor vehicles shall establish rules and regulations to provide standards and tests to measure the percentage of reflective and transmittance of light.

(b) Any person, firm, corporation, or other entity installing such a sunscreen device on a motor vehicle shall provide and affix a label to the front window not to exceed one and one-half (1½) square inches in size, which contains the installer’s name and the percentage of light transmittance. Facing the motor vehicle from the outside, the label shall be placed in the lower left corner of the front window.