Wow, that's quite an error on Red Bull's part. Nothing to do with rule changes as they suggested, they just got it wrong. And to add insult to injury the even applied a tax credit incorrectly!Red Bull’s accounts were finalized in Pound Sterling and the ABA shows its original submission came in at £114,293,000 ($132.4m at the current exchange rate) — nearly £4,000,000 ($4.6m) under the cap — but that the Cost Cap Administration found it “inaccurately excluded and/or adjusted costs amounting to a total of £5,607,000 ($6.5m) in its 2021 Full Year Reporting Documentation.”
I still maintain my theory that they knew they'd gone over the cap in last 2021, and they asked their accounts team to explore all avenues to bring their submission under the cap. This resulted in some creative interpretations of the regulations that the ABA clearly didn't agree with.