Catalans Dragons and Warrington Wolves have been fined for the crowd trouble that marred their Super League match in Perpignan in August.
Highlights from the ill-tempered Super League meeting between Catalans Dragons and Warrington Wolves
The French club must also pay two-thirds of the costs of the investigation.
The Wolves will pay for the remaining third of the costs, with £5,000 of their fine suspended until the end of 2021.
The RFL say the Dragons’ matchday planning and stewarding provision was deemed inadequate and their response to incidents unsatisfactory.
Karen Moorhouse, RFL chief regulatory officer, said: “The behaviour of some of the supporters at this fixture was completely unacceptable and has no place in rugby league.
“Importantly, both Catalans Dragons and Warrington Wolves have accepted that, and committed themselves to taking positive steps in response.
“All clubs have a responsibility to ensure that everybody who comes into a stadium can enjoy the game – that is a key part of our Enjoy the Game campaign, which promotes a welcoming and enjoyable experience for everyone at rugby league, wherever it is played and whatever their role.
“This incident was highly unusual, in a game which has always taken pride in the behaviour of the vast majority of rugby league supporters, and the family traditions it has encouraged.
“However, we are aware that it was not the only disappointing off-field incident in the 2019 season and it is important we are not complacent in that regard.
“We will be working with clubs to reinforce the importance of the Enjoy the Game campaign during the off-season.”
Tomkins and McIlorum were banned for three and two matches respectively for their part in the brawl and team-mate Kenny Edwards was charged but later cleared of crowd incitement.