issues for new DST rules for Acuña and Piedras Negras in state Coahuila, Mexico

Issues arise whether to observe new DST rules for Acuña and Piedras Negras in state Coahuila, Mexico Coahuila no acatará horario de verano (in spanish) http://www.exonline.com.mx/diario/noticia/primera/pulsonacional/coahuila_no_... ara_horario_de_verano/889695 or http://www.worldtimezone.com/dst_news/dst_news_mexico052.html Alexander Krivenyshev, http://www.WorldTimeZone.com