Reference to additional permanent concussion substitutions is found in:

The provision as it is printed, and everything on Ruleside that turns on it.

The referee and other match officials, especially the fourth official:

· should give appropriate support where a player has an actual or suspected injury, including by informing the team captain, coach and/or medical staff if they suspect that a player needs to be assessed and/or treated;

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 Notes and modifications that Ruleside cites.