FIFA Law 4 states that a player may not use equipment that is dangerous to himself or another player. This is further expanded upon in the Interpretations of the Laws of the Game whereby it is advised that players may use equipment that has the sole purpose of protecting the individual physically providing that it poses no danger to the individual or any other player.

Modern protective equipment made of soft, lightweight, padded materials are not considered dangerous and are therefore permitted.

Hard plaster casts are considered to pose a danger to both the wearer and other players and are not permitted to be worn. The practice of padding a hard plaster cast does not reduce the element of danger.

Players wearing a soft, lightweight, cast will be permitted to play if the cast does not present a danger to the individual or any other player.

The referee (or Supervisor of Officials if one has been appointed to the match/tournament) will make the final decision as to the acceptability of any cast.

Any player who uses a cast to intimidate or injure an opponent shall be cautioned or sent off depending on the nature of the player’s action.