Ascenso MX (Promotion League) is the second professional level of the Mexican football league system. The champion of the competition is promoted to Liga MX (top-flight division). he bottom team gets relegated to Segunda División de México (the third tier). Formerly known as Primera División A (First Division A) the league changed its name and competition format in 2009 to Liga de Ascenso. It was rebranded as Ascenso MX in 2012. The main changes are that clubs now do not need a FMF certification to get promoted and that the competition doesn't use group stages.