A sunscreening device must have a label that:
(1) is legible;
(2) contains information required by the department on light transmission and luminous reflectance of the device;
(3) if the device is placed on or attached to a windshield or a side or rear window, states that the light transmission of the device is consistent with Section 547.613(b)(1) or (2), as applicable; and
(4) is permanently installed between the material and the surface to which the material is applied.
Official text of the Texas Transportation Code as published by the Texas Legislative Council.