AGE ELIGIBILITY AND PLAYER DEVELOPMENT X. AGE ELIGIBILITY AND PLAYER DEVELOPMENT A. AGE ELIGIBILITY RULE 1. Definitions Player Development requirements and the Age Eligibility Rule (“AER”) are  applicable to competition in Professional Tennis Tournaments worldwide. For the purposes of this Rule, competition in a Professional Tennis  Tournament is defined as participation in the singles or doubles Main  Draw or Qualifying Draw of any Tournament at which a player earns  WTA ranking points (singles or doubles) or, but for the operation of  the WTA Rules or the player’s violation of the WTA Rules, would have  earned WTA ranking points. Participation in a Professional Tennis  Tournament counts toward a player’s AER Tournament Allotment. If a  player participates in the Qualifying Draw and qualifies for the Main  Draw, it will count as only one (1) Tournament. Similarly, if a player is  competing in both the singles and doubles draws, it will count as only  one (1) Tournament. a.  Competition in a Professional Tennis Tournament b. Age Competition in a Professional Tennis Tournament under the AER  does not include: (i) participation in the draws of the Women’s ITF  World Tennis Tour events in which a player does not earn WTA  ranking points; (ii) participation in the draws of Women’s ITF World  Tennis Tour 15s events before August 5, 2019; or (iii) receiving a  zero (0) ranking point result for not participating in a Grand Slam or  Commitment Tournament. For the purposes of this Rule, a player’s age is determined by her age as  of the date of the start of a Tournament’s singles Main Draw.  A player 18 years of age or older no longer is subject to sub-Section A of  this Rule but is required to continue participating in Player Development  (sub-Section B) until she receives notification of graduation from a WTA  representative. 2.  Event Participation a.  AER Tournament Allotment and AER Wild Card Allotment at Professional  Tennis Tournaments 173