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MLS and the Professional Referee Organization will run the first offline test of the Video Assistant Referee (VAR) initiative in a regular-season match when the Colorado Rapids host the Vancouver Whitecaps on Friday night.
Though the technology involved will likely be visible to most fans (a monitor, sometimes tented, on field level), this step of the VAR initiative – which eventually will be implemented in all MLS stadiums after the 2017 MLS All-Star Game – won't impact any calls made on the field or involve any communication with the four on-site match officials.