IOC President Jacques Rogge also has announced that suspensions will be implemented after a positive A-sample. In the past they have waited until the B-sample has been analyzed before confirming a positive test. That is another twist in the battle to catch cheats under the World Anti Doping Code.
http://ca.news.yahoo.com/s/cbc/080514/s ... gs_conte_1
An interesting look into purported test-evasion:
"They fill up their own cell phones so that when the testers call it says. 'Sorry, the mailbox is full, you can't leave a message.' Then the testers call other numbers. By the time they show up the athletes are clear, and they test negative. What's the worst consequence? It's a missed test."