Brisbane Roar and Sydney FC have until Thursday afternoon to convince Football Federation Australia why they should not be fined for Saturday night's ugly A-League fracas.
The FFA on Tuesday also asked for a "please explain" from fiery Roar striker Besart Berisha who sparked the post-match melee at Suncorp Stadium when he invited defender Pascal Bosschaart to the players' tunnel to settle their differences.
While the A-League's match review panel found they had no jurisdiction to rule it as a red card offence, Berisha could be suspended or fined for bringing the game into disrepute.
The FFA have listed three alleged code of conduct breaches made by the competition's leading goal-scorer relating to offensive and provocative behaviour.
While Bosschaart, who waged a running battle with Berisha during the match, was cleared, he will not line up for the Sky Blues against Perth Glory on Wednesday night due to an automatic one-game ban for his fifth yellow card of the season.
A furious Bosschaart was booked following Berisha's last-gasp goal which delivered the Roar a come-from-behind 2-1 victory.
After the final whistle, Berisha then took off his shirt and grabbed at the Dutchman's arm and motioned for him to join him in the tunnel.
The Albanian international was one of three Brisbane players - along with Erik Paartalu and Ivan Franjic - who failed to shake Bosschaart's hand before the game.
After the match, Paartalu said the defending champions were particularly unhappy with sledging during Sydney's 2-0 win over Brisbane at Kogarah on December 4.
The following day, Bosschaart was quick to deny he had said anything about Berisha's family.
While Brisbane started to assemble their defence on Tuesday afternoon, vice-captain Shane Stefanutto said he had no problem with team-mates failing to shake hands with Bosschaart before their fiery clash.
"That's another personal thing and another thing from individual bases," he said.
"As a vice-captain and as a leader in this group I say everyone is entitled to their own opinion and their own belief on what they want to do.
"As a team we're a tight-knit bunch, we're a strong bunch and we'll back each other up and that will not change for any situation."
Asked whether he thought the post-match scenes were a bad look for the game, Stefanutto said: "Everyone is entitled to their opinion.
"People say yes and people say no, it's all up to the individual on that point I think."
Stefanutto, who set up Berisha's match-winner, could wear the captain's armband on Saturday night when Brisbane meet third-placed Melbourne Heart with skipper Matt Smith carrying a corked thigh.