The coronavirus pandemic has forced dramatic changes to F1, with teams agreeing earlier this month to delay until 2022 the introduction of a major rules revamp that had been planned for next season.
It means teams will continue to use their current chassis next year, with some aerodynamic modifications being allowed.
The move to keep the current regulations for 2021 could have left the door open for Mercedes to keep the advantage it has from its DAS system, which allows drivers to adjust the toe angle of its front wheels while the car is in motion.
However, in the wake of F1 keeping its current cars for another year, the German car manufacturer agreed with other teams and the FIA to a change in the regulations that outlaws it.
The new Article 10.4.2 of the revised 2021 Technical Regu