1. Where is the language in the statute that says a local health agency's authority to take action in response to a pandemic is limited to burning livestock? It doesn't exist. The statute is painfully clear that a local health agency has broad authority to do what it wants to limit the negative impact of infectious diseases. The local ordinances that do so specifically reference this section. There is literally nothing that supports your "theory" that it is Newsom's fault that local agencies have implemented their own ordinances because they only have that authority that local agencies may not implement their own pandemic rules unless the governor has declared a state of emergency. That is just a lie no matter how many words you use to obfuscate that.
2. States are not "sovereign". They have only powers not granted to the federal government, which you would know if you read the Constitution or were an attorney. Second, you are correct that the Constitution doesn't care if LA is bigger than Rhode Island. But do you know who does? The "sovereign" state of California, which decided by state statute using its state power that it would allow its local jurisdictions to decide how to handle pandemics in their jurisdictions as they decide are best unless and until the state decides it must intervene. So just as the federal Constitution allows the federal government to delegate certain matters to the states, which it does all the time, the state Constitution allows the state to similarly delegate things like authority to handle a pandemic, to local jurisdictions unless and until it decides otherwise. There is no practical reason why L.A. should have less ability to make decisions about how best to handle a pandemic in its jurisdiction than Rhode Island, and there is also no legal reason either given that the "sovereign" state of CA has elected to use its state power to let local jurisdictions decide what is best for them. This provides by far the best flexibility for everyone because places like LA County obviously have different needs than Butte County, but the state can certainly intervene using its state power if it decides one of them is fucking it up. Honestly, you sound like someone who went to law school and took constitutional law but completely failed to learn anything about a state's "sovereign" power, which includes its "sovereign" ability to establish how government in its state works.
3. This is just made up bs.
4. As I have asked before, where is the legal authority that says the Health and Safety Code section that provides local jurisdictions with authority to implement their own rules and regulations in a pandemic is limited to burning clothes and livestock, as you claimed? I actually cited the statute that is directly on point, which is not "quasi" law. The only "quasi" legal discussion here was your bs nonsense about a county's authority being limited burning livestock and something to do with measles based on a vague penumbra that you can't support with a citation to anything.
I had not made any personal attacks on you, yet here you are doing exactly that, probably because that is the only thing you can do in response to the fact that your "legal" opinion that counties only have the authority to implement mask and other mandates if a state of emergency is declared - or is limited to some nonsense about burning livestock - is simply a lie. You don't practice law and probably never have, that is clear. And although that is not a requirement to understanding how the federal, state and local governments interact and what authority they have, it is very obvious that you have no idea what you are talking about. You are so clueless that you're talking about the US Constitution on an issue that is governed by the California Constitution because, you know, the "sovereign" state of California gets to decide what its local jurisdictions can and cannot do.