]Roles and  Responsibilities3   PARTARTICLE  2 0   Additional Rol es and  Responsibilities of SignatoriesARTICLE  21   Additional Roles and Responsibilities  of Athletes and Other Persons  World Anti-Doping Code • 2015113ARTICLE 21   ADDITIONAL ROLES AND RESPONSIBILITIES OF ATHLETES AND OTHER PERSONS21.1  Rol es and Responsibilities of Athletes 21.1.1  To be knowledgeable of and comply with all applicable anti-doping policies and rules adopted pursuant to the Code.