A government agency isn't a better authority on the law than your own lawyers are, if you’re rich enough to access the courts.
The agencies, including the white house, offer one interpretation of the law, and they don't know your interpretation. Make it expensive for them to disagree with you and they will likely back off. But also be prepared to continue that fight in court in case they didnt back off. They theoretically have unlimited resources but are frugal.
That is a potentially grave mistake to make. They are in no way frugal (the very concept of being frugal with an unlimited faucet of "other people's money" is truly ridiculous). If they forbear to go to trial and/or appeal adverse rulings, it is only because they strongly prefer never to suffer adverse precedent. They would rather lose the same case a thousand times, than have precedent which restores the rights of ten thousand all at once, let alone 300 million. In a way it's quite the opposite of frugality.