57 ARTICLE 21  ADDITIONAL ROLES AND RESPONSIBILITIES OF ATHLETE  SUPPORT PERSONNEL ................................ ................................ ................................ .....................  58 ARTICLE 22  ADDITIONAL ROLES AND RESPONSIBILITIES OF OTHER PERSONS  SUBJECT TO THESE ANTI -DOPING RULES  ................................ ................................ .........................  58 ARTICLE 23  INTERPRETATION OF THE CODE  ................................ ................................ .................  59 ARTICLE 24  FINAL PROVISIONS  ................................ ................................ ................................ .........  59 APPENDIX 1  DEFINITIONS  ................................ ................................ ................................ ....................  62   WADA 2021 IF Model Rules ( December  2019)   Page 4 of 69    WORLD LACROSSE  ANTI -DOPING RULES  INTRODUCTION  Preface   These Anti -Doping Rules are adopted and implemented in accordance with World Lacrosse 's responsibilities under the Code , and in furtherance of World Lacrosse 's continuing efforts to eradicate doping in sport.