9.15
The provision as it is printed, and everything on Ruleside that turns on it.
A player who makes unauthorised marks on the field of play must be cautioned for unsporting behaviour. If the referee notices this being done during the match, the player is cautioned when the ball next goes out of play.
Verdicts that turn on it 1
Walk the tree to any of these and this clause is part of the answer.
The Laws of the Game are published by The IFAB and quoted here for the purpose of explaining the decisions on this site. Ruleside is not affiliated with The IFAB or FIFA. Every clause of The Field of Play that Ruleside cites.