Tesla, being designated critical infrastructure like all vehicle manufactures per federal guidelines, should have never had to battle it out with county bureaucracy in the first place.
Not even recommended guidance, just advisory. AKA "Here's a one size fits all list we expect you to tailor to your particular situation."
Never mind that “federal guidelines” have no legal relevance to county or state health orders. The US constitution leaves police power, including quarantine orders, to the discretion of the states.