Issue link: http://itf.uberflip.com/i/237831
16 Be responsible for any ball mark inspection. There shall be no ball mark inspections except on clay courts (see Ball Mark Inspection Procedures, page 9). 17 Exercise his/her best efforts to control the crowd. Whenever the spectators are disturbing the progress of the match, the Chair Umpire should address them respectfully and request their cooperation. 18 Be responsible for the direction of the ball-kids during the match so that they assist, but do not disturb, the players. 19 Be responsible for all changes of balls and for determining if a ball is fit for play. Ensure that the correct numbers of balls are in play. Lost balls should be replaced as soon as it is practical. If a ball needs to be replaced, a new ball shall be used as a replacement during the warm-up or within two (2) games (before the first point has started in the third game) after a change of ball; otherwise a used ball of like wear shall be supplied. The appropriate number of ball containers should be opened and inspected sufficiently in advance of each ball change so as to avoid any delay in the match. 20 Determine if a court continues to be fit for play. If a change in condition occurs during a match that the Chair Umpire considers sufficient to make the court unfit for play or if weather or other conditions require suspension of play, he/she should suspend play and report the same to the ITF Supervisor/Referee. During the suspension and, until a match is postponed, the Chair Umpire must ensure that he/she and all other on-court officials are ready to resume the match. If suspension is due to darkness it should be at the end of a set or after an even number of games in the set in progress. Upon suspension or any postponement by the ITF Supervisor/Referee, the Chair Umpire shall record the time, point, game and set score, the name of the server, the side on which each player was situated and shall collect all balls in use for the match. 21 At the conclusion of a match make a full report to the ITF Supervisor/Referee concerning all actions taken under the Code of Conduct during the match. E REVIEW OFFICIAL A Review Official shall: 1 Be completely familiar with all aspects of the Rules of Tennis, and in particular with the Electronic Review Procedures, the appropriate Tournament Rules and Regulations and the Duties and Procedures for Officials. His/her duties shall be carried out in accordance with ITF procedures. 2 Dress uniformly with other Review Officials as directed by the ITF Supervisor/Referee. 3 Be in the Electronic Review Booth at least thirty (30) minutes prior to the start of play for the first match of the day or session on the court he/she has been assigned on, and 10 minutes before the start of later matches. 4 Check the available means of communication with the Chair Umpire, ITF Supervisor/Referee, Screen Operator and Television. 5 Confirm with the Virtual Reality Operator that the system is set for the appropriate event, ie singles or doubles, scoring system in use, etc. 6 During the warm-up, view at least one (1) Test Review which shall not be shown to Television or on the screen. 6