X. EXHIBITS EXHIBIT W - Retractable Roof Policy X. EXHIBITS EXHIBIT X - Writing Table For Umpire Chairs Whenever practical, playing conditions on the center court will remain the same  as on all other courts.  In the event rain is falling prior to the scheduled starting time of the match, the roof  will remain closed for the duration of that match. If the rain stops and the forecast is good, the roof may be opened after the match  in progress is completed. Decisions on re-opening the roof will be made on a  match-by-match basis depending upon current conditions and the forecast. If play commences with the roof open, a decision to close the roof will normally be  made after play has stopped because of rain, although if other factors warrant the  roof to be closed prior to this, the Supervisor will make that decision. The roof will not normally be closed because of the threat of rain. In the event high winds, sufficient to harm the retractable roof, are forecast with  reasonable certainty, the roof may be closed prior to the start of the match. The  reverse is applicable when the roof is closed and high winds or other conditions  necessitate, for safety reasons, that the roof be opened. In the event that the temperature is below 50F / 10C prior to the start of a match,  in order to enhance the fan experience, the roof may be closed as directed by  the Supervisor. Decisions on whether to close the roof for cold will be made on a  match-by-match basis. The ATP Supervisor shall be the final authority on all decisions regarding the In some instances, the roof must be partially closed for the lights to function prop - erly. In this case, the roof must be partially closed prior to the start of the match. In an effort to provide a comfortable platform for the Chair Umpires to place their  hardware such as tablet, walkie-talkie, net device handset, it is requested that all  tournaments attach a writing table according to the instructions below to the Chair  Umpire’s chairs on all match courts. This simple and low cost upgrade will contribute tremendously to reduce scoring er - rors caused by data being accidentally entered as a result of the umpire holding the  tablet in their hand and ease the process of entering data in the tablet. When setting up the writing tables, please make a note of the following: •  Attach the writing table to the right side armrest. If there is a microphone attached  to the chair, the microphone must be installed on the left side of the chair so as  not to interfere with the writing platform on the right side armrest.  •  Ensure that the writing table is installed with the slender end at the back of the  armrest. The design is made considering most armrests are 20 inches (50.8 cm)  long and 3 inches (7.62 cm) wide. This design calls for the overall dimension of  32 inches (81.28 cm) which leaves a full 12 inches (30.48 cm) of space in front of  the umpire for the various equipment.  • A standard wood product could be used. For example, in the USA a 1 x 12 could  be used and just cut to length and ripped for the 9 x 20 piece that is taken out. The  actual dimension of a 1 x 12 is 11 ½ inches wide by ¾ inches thick. A comparable  product could also be used in countries using the metric standard. 334 335