Mexico’s President Enrique Peña Nieto and the country’s major political parties sent Congress a far reaching telecommunications reform law that, if approved, will crack down on monopolies, a shift in policy that could affect Carlos Slim’s status as the richest man on the planet. Slim’s America Movil (NYSE:AMXL), which controls 70% of Mexico’s wireless market and approximately 80% of landlines, is the largest telecommunications network in Latin America and remains his most valuable holding, accounting for $36.3 billion of his net worth on FORBES most recent Billionaires List.