During the Spanish Grand Prix, Sir Lewis Hamilton said that he had noticed the rear wing of title rivals Red Bull looked to be flexible, gaining them three tenths down the main straight at Barcelona.
After the weekend was over, the FIA announced it would tighten load testing requirements for the part and that by mid-June, teams will have to comply with rules which allow for less flexible rear wings.
However, the cars are allowed until July to fully align with the new regulations, and as such Hamilton told Sky Sports that the FIA was adopting a wait-and-see approach with the rules, potentially handing Red Bull an advantage.
"It’s going to be worth at least six-tenths there (Baku), probably,” Hamilton said.
"I think we need to continue to apply pressure to the FIA to just do a better job of controlling things, you know?
"If you look at the last race, for example, we were supposed to all keep our (tyre) blankets on in qualifying. Red Bull were allowed to take theirs off, and no-one else is allowed to. So I think we just need to make sure it’s consistent for everyone.
"What you’ve got to acknowledge is that these engineers are geniuses, so if you leave them wiggle room, they will wiggle."