AGE ELIGIBILITY AND PLAYER DEVELOPMENT SECTION X - AGE ELIGIBILITY AND PLAYER DEVELOPMENT d.  Elite; and e. Premier. The specific player participation requirements of each phase are detailed  below. All players 18 years of age and under and players who remain subject  to Player Development requirements (regardless of age) are required to  check in with the on-site WTA Office staff on the first day of Qualifying, no  later than the Qualifying Sign-In Deadline (4:00 p.m. Tournament local time,  the day prior to the start of Qualifying) to confirm their Player Development  requirements due at that event. A player who has achieved a Top 5 Year-End ITF Junior Ranking or has  reached a final at an ITF Junior Grand Slam or ITF World Tennis Tour  Junior Finals Singles event may elect, but is not required, to participate in  the Pro Path Phase. A player must participate in and complete Pro Path  Phase Player Development requirements to be eligible to use the Pro Path  Merited Increases detailed above. A player and her Support Team must  still complete all other Player Development requirements regardless  of whether she elects to participate in the Pro Path Phase. A player  participating in the Pro Path Phase is subject to Player Development and  AER requirements at all Professional Tennis Tournaments. 2.  Pro Path Phase a.  Eligibility and Timing b.  Pro Path Phase Requirements i.  Each player must complete assigned online and/or in-person Player  Development coursework and pass an examination covering such  material. ii.  Minimum Educational Requirements Each player must submit to the WTA an official certificate from her  country of legal residence verifying that she is meeting or has met  her country’s minimum educational requirements. A player must  submit updated documentation annually until she reaches 18 years  of age.  Each player must undergo a mandatory physical examination  annually in accordance with Section XVIII.B.1. iii.  Mandatory Physical Examination 184