There was a strict crackdown on any form of dissent early in the season, with players often penalised for simply putting their arms out in reaction to umpiring decisions.

But last week the league privately instructed umpires to let a small level of emotion go unpunished as long as players show restraint.

It comes as the AFL claims the dissent rule has already been successful in changing player behaviour at all levels of football.

"The players have continued to adapt, and are adapting well, as are the umpires," an AFL spokesperson said.

"It is having the desired effect on reducing umpire dissent on field and having a positive impact at the junior level we wanted.

"Everyone is playing their part as the season progresses."

Moments like the Jordan De Goey incident in round nine, when the Collingwood star showed frustration at an umpiring decision but held back, will no longer result in a 50-metre penalty for dissent.

Magpies coach Craig McRae gave the adjustment his tick of approval.

"It's just a natural progression," McRae told Fox Footy.

"You can see the players are really trying. They are."

Australian Associated Press