Rugby league's international governing body has endorsed the NRL's ban on the shoulder charge by extending it across all competitions.
All rugby league matches - starting with this weekend's World Club Challenge between NRL premiers Melbourne and Super League champions Leeds - will now be played under the new rules prohibiting the shoulder charge.
Rugby League International Federation chairman Scott Carter said competition already in progress - such as the Super League - will be allowed to separately determine if the rule is implemented immediately.
"Reviewing rules such as the shoulder charge is an important part of ensuring we have created the right environment for our players,'' Carter said in a statement.
"Player safety is a fundamental principle and the latest research and current trends show that the shoulder charge has the potential to create an unacceptable risk of injury for players.''