Originally Posted by
gregf83
Based on complaints it's not enforced very well. Once you enter the draft 'zone' you have a specified time limit (15 S?) to exit the zone. Two or more people leapfrogging each other can gain a substantial advantage while still following the rules.
15 seconds would seem not much time to close a 10 meter distance and pass whoever's in front of you --depending on how closely matched the riders are in strength. And yeah, a quickly rotating paceline would seem to get around the rules.