The NRL has confirmed extra time will be played in all finals matches that finish level after 80 minutes.
A period of golden point - where the first team to score wins - has been used to decide drawn games, with last year's Grand Final the first to be settled in such circumstances when Johnathan Thurston's drop goal sealed victory for the North Queensland Cowboys.
However, for future finals matches that end level, teams will play 10 minutes of extra time before golden point is used.
"We engaged all the relevant stakeholders and there was strong support for this change," said NRL CEO Todd Greenberg.
"The stakes are clearly high in finals series matches, and especially in the Grand Final, so it makes sense to have a period of extra time prior to golden point.
"There were a number of alternatives considered but the consensus by and large was that the game should introduce extra time in finals series matches.
"Not only will it mean a more expansive style of football in the extra-time period, it will also be less likely that a team is eliminated in golden point."