Electronic performance and tracking systems may be worn by players on the field of play subject to the approval of the referee. In order to be approved, player tracking systems must comply with the following requirements:
The system must be safe for players and must not pose any danger to anyone on the field of play.
The system must be marked with the International Match Standard certification as set out in the Laws of the Game.
The items worn by players must be free of team and manufacturer identification and sponsor advertising.