Wasn't the Ferrari thing 2008 anyway, and it was to do with the bits that went up and over the front nose? The FIA amended the regulations and made all the teams put in little struts to tie the wing bit to the nose.
But again, the car wasn't illegal. It passed scruteneering, but looked to flex, so the FIA changed the regs a bit and they amended their car accordingly. The FIA have already increased the weight applied to the front wings (maybe even twice?) and the RB still passes, so it is legal.
If a car is deemed illegal then it will be excluded from the race (a la Sauber), the fact all these cars keep racing means they are legal. Full stop. End of.