The Metropolitan Transport Authority (AMET) has announced plans to stop all vehicles with tinted windows, with the exception of the front window. Tints need to allow for complete visibility of the inside of the vehicle. The director of Ground Transport (Direccion General de Transito Terrestre) Luis Estrella said that the measure, which is being introduced for both health and safety reasons, is included in Art. 156 of Law 241 on Transit.
http://www.diariolibre.com/noticias/2014/10/11/i832421_amet-dice-cumplir-resolucin-sobre-cristales-tintados-vehculos.html