All teams that are admitted into the two divisions (one standard, one with all custom maps) will have to be sponsored by two other clans, and if a player is caught cheating both the offending clan and its sponsors will be removed from the league.

Also, here's an interview with Tony Ray from PunkBuster. The most popular anti-cheat program for Counter-Strike. It's pretty lengthy stuff although it's curious that Tony mentions it takes him 10minutes to write a catch for the current hack out there but it's been a known issue for weeks.