The lightweight spray is visible for 45-90 seconds until it disappears. Usually the sprays are natural and biodegradable. Referees use the spray to mark the 10 yards between a free kick ball placement and where the opposing team can line up. Encroaching on the ball is a common issue during free kicks. This problem can mean an unfair advantage for a team or time wasted as the referee enforces the 10 yard rule.
Overall reception of the spray has been positive. It also has appeared to serve its purpose in moving the game along while keeping players in check for encroaching violations. It will be interesting to see how the IFAB rules. The change is somewhat small, especially considering the magnitude of possibly introducing goal-line technology. Even so, purists of the game may be resistant to this change. Ref. soccerlens.com, soccersprays.com Pic. Ref. theoffside.com
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