2.2 Examples of Performance Standards
2.2.13 Even / smooth surface
Keeping the surface as even as possible helps ball control, especially speed and roll of a ball.
In addition, a smooth even surface helps the ball to more likely end up where it is meant to without being put off course by small hollows, holes or bumps on the surface.
An even surface makes it safer for a player to run, tackle, turn and control the ball with reduced fear of spraining an ankle, or worse.