The FIA has reacted by issuing a technical directive to teams that references both short and long term measures.
However, it's understood that there will be no impact on how teams run their cars in Montreal this weekend, when the FIA's focus will observation and data gathering.
In a statement, the FIA said: "Following the eighth round of this year's FIA Formula One World Championship, during which the phenomenon of aerodynamic oscillations ("porpoising") of the new generation of F1 cars, and the effect of this during and after the race on the physical condition of the drivers was once again visible, the FIA, as the governing body of the sport, has decided that, in the interests of the safety, it is necessary to intervene to require that the teams make the necessary adjustments to reduce or to eliminate this phenomenon."
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Sounds like the FIA will not stipulate what changes need to be made, just that the changes must reduce porpoiseing/bouncing /bottoming out, to levels that will not fail the new criteria being introduced.
The simplest easiest way to do that, is increase ride height, so basically, this is an FIA mandated increase in ride height, for all teams most affected by the phenomena.
If the team can meet the criteria, without increasing ride height, they will obviously be at a performance advantage over the others.
So to me this is a rather unfair way of doing things.