"I suppose the guys who were good jacklers and stealers around the ruck will have to change their games as well," Jackson said.
If World Rugby ratify the law variations, tacklers will have to roll away and their teammates will have to take up space and drive over the ball. Jackson thought mauls might become more prevalent with an even greater emphasis on strong scrums.
One of the difficulties would be getting Super rugby players to alter the way they have played throughout that series before making the transition to the provincial series.
There were also plans to use twin referees but until sides got used to that at training, Jackson was unsure about that effect.
"I hope they won't slow the game down and will make more decisions rather than having to go to the TMO.
"I understand one will try and look at the breakdown and the defensive line and there has been talk about a metre back from the breakdowns so there are going to be a lot of learnings for a lot of players.
"I'm not too sure if game needs two refs but we don't know until we try. Who has more influence, the attacking ref or defensive one?"
Jackson was sure he would need to use different types of loose-forwards who were ball carriers, link players and tacklers.