2017-07-18 08:27:46 UTC
Pat Symonds expanded on this by saying that ALL teams have front wings that are legal in as much as they pass the FIA tests. The FIA tests place specific loads at specific points. All teams design their wings to satisfy the tests - which means that some parts may still flex.
In the case of the Red Bull it is flaps on the end plates that seem to move down in order to create a seal with the ground.
Red Bull were under the spotlight - by SKY, not by FIA - but I inferred from Symonds' comments that other teams might also have parts that are moving on wings that pass the FIA tests.