The ability to communicate the changes to SMS allows athletes to use a simple phone to make the relevant communication, allowing the sending of updated information from anywhere and at any time. For example, if an athlete has provided a period of 60 minutes to be checked between 19:00 and 20:00 to 18:00 and has an unforeseen event that prevents you from being in the location indicated in a set period (for example, if have to take a family to a hospital emergency department, or if there is a breakdown in transportation systems) may communicate this change through a simple SMS, through this period to a little later.
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