The FIA has made a rule now that any new/innovative finding on a car gets banned the next season.
So if a team develops something, they can run it for one year after which it's banned from the sport.
All of this is to cut cost for the smaller teams; take the DAS system of Mercedes (Double Axis Steering). If the FIA doesn't ban it all teams need to be running it next year, or they fall behind. However its a complex system and the small teams (Haas, Williams, Alfa Romeo for example) might not have the money to research and build it.
So if you don't have massive amounts of engineers and test equipment to invent / develop new things that give you a performance boost for one year then you don't have a chance of winning. Doesn't seem like a very clever way to cut costs to me... Well, maybe it does cut costs, but it also prevents any small team from ever winning.
So if a team develops something, they can run it for one year after which it's banned from the sport.
All of this is to cut cost for the smaller teams; take the DAS system of Mercedes (Double Axis Steering). If the FIA doesn't ban it all teams need to be running it next year, or they fall behind. However its a complex system and the small teams (Haas, Williams, Alfa Romeo for example) might not have the money to research and build it.