ARTICLE  6 ANALYSIS OF  SAMPLES   Samples shall be analyzed in accordance with the following principles:   6.1 Use of Ac credited, Approved Laboratories and Other  Laboratories   6.1.1  For purposes  of directly  establishing  an Adverse  Analytical  Finding  under  Article 2.1, Samples shall be analyzed only in WADA -accredited laboratories or laboratories  otherwise  approved  by WADA .