 For the 2009/2010 season, the format of the tournament has been reorganized to a home and away format, which all teams will play in their respective group.The 13 groups consist of teams who are eligible to play in the liguilla de ascenso for one promotion spot, teams who are affiliated with teams in the Liga MX, Ascenso MX and Liga Premier, which are not eligible for promotion but will play that who the better filial team in an eight team filial playoff tournament for the entire season.The league format allows participating franchises to rent their place to another team, so some clubs compete with a different name than the one registered with the FMF.