ARL Commission chairman Peter V'landys said the game was listening to its players and coaches after confirming an 18th player would be in use from round five if a team is affected by foul play or three failed HIAs.
NRL coaches will be able to use any registered player from their top 30 squad as an 18th player, the ARL Commission confirmed on Tuesday morning.
An 18th player will be able to take the field when three players fail a head injury assessment or when a player suffers a match ending injury caused by foul play.
Foul play will only be determined if the opposition perpetrator is sin-binned or sent off.
In a change to initial talks surrounding the use of emerging players as a replacement only, the ARL Commission clarified an 18th player can be a registered NRL player who is eligible for selection in that round and part of the 21-man squad.