STANDARDS SECTION XVIII - TOURNAMENT STANDARDS OF PERFORMANCE a.  The booth must be located in direct line of sight to the court, in order to  provide an unobstructed view of the court. It should preferably be at the  back (North or South end) of the court when possible.  b. The Review Official must have a full view of the whole court and line  umpires. c.  The booth must have direct audio from the Chair Umpire’s microphone  (not from the television feed). d.  The Review Official should be able to hear the line umpire calls from the  court. e.  The booth must have room for five (5) persons plus equipment (minimum  of 25 sq. meters (82 sq. feet) with a minimum court frontage of 5 meters  (16.5 feet) as required by review vendor). f.  The booth should have full air conditioning for equipment and personnel,  unless technically unable to do so, and approved by the WTA and the  vendor. g.  Access to the booth must be reasonably easy and safe. h. Appropriate communication with the Supervisor, Chair Umpire, and  Video Board operator (if not in the same room) must be available.  i.  Tables, chairs, and high stools must be provided as requested by the ELC  team. a.  A player must designate her on-court coach prior to the start of her match  or before going back on court to finish a suspended match (same or  different day). A player can designate her on-court coach by signing in  with the Supervisor in the on-site WTA office.  b. For doubles, both players may designate an on-court coach; however,  only one (1) coach is permitted on court at a time.  D. ON-COURT COACHING 1 1.  Designation Procedures Provided the following rules and procedures are followed, a player may  request that her coach go on-court during a match to provide coaching. 1  Off-Court Coaching is being trialed in 2021. 370