Josh Hodgson will be in charge of pulling the trigger for the Canberra Raiders' captain's challenge this season as the Green Machine develop tactics for rule changes. Raiders coach Ricky Stuart said Hodgson would be the nominated negotiator for the divisive challenge system. Hodgson and Jarrod Croker are co-captains, but teams can only have one designated player for the challenge. The rule is set to cause chaos in the opening rounds as teams get used to interpretations and deciding when the best time is to use it. Stuart said the Raiders had also been working on scrum tactics, with teams able to choose where on the field it is set. The Raiders were dudded by referees in the NRL grand final five months ago, a controversial "six again" call still giving the players and fans nightmares. Stuart said he backed any innovation to make the game more appealing to supporters and was keen to see how it played out. "I've spoken to Josh Hodgson about [the captain's challenge] ... there will be a little bit of communication from the sideline but in the heat of the moment Josh will make that decision," Stuart said. MORE RAIDERS NEWS "Only one captain can nominate to the referee, that will be Josh Hodgson. I don't think it's any extra pressure. He sees and feels the interpretations of the game. "I'll mainly leave it to Josh. He's an intelligent young bloke. Like all new rulings, it will take a little bit of time to get used to. If it's going to have fan engagement ... any rule [change] is good." The Raiders were the best team at exploiting the one-on-one strip rule change last year and the scrum tweak could be next on their radar. "It gives you a number of options. I believe you'll see a lot of teams nominate the middle of the field ... I think you'll find there might be a lot more width by taking it on the 10 metre line," Stuart said. "It will create a lot of wide-open spaces to attack. We talk about having too much defensive dominance, this is a rule to help teams attack."