Concussion substitute in Football with New IFAB Rule
International Football Association Board are allowing trials for concussion substitute in football leagues around the world.
The replacements can bat and bowl in place of a player with concussion or suspected concussion; match officials have to determine that the new player is a "like for like" replacement.
The International Football Association Board is the body that determines the Laws of the Game of association football. IFAB was founded in 1886 to agree standardised Laws for international competition, and has since acted as the "guardian" of the internationally used Laws.