For the first time , Major League Soccer referees are using a special vanishing spray . Refs spray a temporary white line three meters from the spot of free kicks . The spray disappears after one minute . The line keeps opposing players back and disappears after a minute . It 's already been used in games the first half by FIFA .
For the first time , Major League Soccer referees are using a special vanishing spray . Refs spray a temporary white line three meters from the spot of free kicks . The line keeps opposing players back and disappears after a minute . It 's already been used in games the first half by FIFA .