1. Pursuant to the WADA Code, there is a presumption that laboratories which have been accredited for a particular test conduct sample analysis in accordance with international laboratory standards. An athlete may rebut this presumption by establishing by a “balance of probability” that a departure from the International Standard occurred. If the athlete shows such departure, the burden then shifts to the Anti-Doping Organization to establish that such departure did not cause the Adverse Analytical Finding (AAF).