Article 6  Analysis of Samples   Samples  shall be analysed  in accordance with the following principles:   6.1 Use of Accredited, Approved Laborato ries and Other Laboratorie s  6.1.1  For purposes of directly establishing an Adverse Analytical Finding  under Article 2.1, Samples  shall be analysed  only in WADA -accredited laboratories or laboratories otherwise approved by WADA .