New procedures could be on the way for GAA players who take a knock to the head during games.
Tyrone, Fermanagh and the North American Board are leading the drive for a rule addition, which would require referees to instruct a player who takes a serious blow to the head to leave the pitch immediately for medical attention.
The player would not be allowed to return unless tests for concussion proved negative.
The proposal, which comes at a time when concussion protocols in other sports are under scrutiny, will be on the Congress agenda on February 28.
It also allows for a replacement while the player is being treated and assessed, which is currently the case for blood injuries.
Players are notoriously reluctant to leave the pitch after taking a knock but, if the latest proposal is accepted, responsibility will transfer to the referee.
Under current rules, a temporary replacement is only allowed for a blood injury.
A team must make a full substitution - or carry on with 14 players - in all other circumstances.