:: Basically states can do whatever they want, although equal protection clauses could be used to strike down a law if, for example, one law was stricter on one type of business over another. ::
The 14th Amendment is relevant as is the Interstate Commerce clause.
An ordered lockdown is only applicable to the residents of the State locked-down.
Residents of other states do not have to comply when in the locked-down State.
Interstate Commerce is violated when a business, operating in multiple States, is treated differently among those States simply by having operations within a certain State.
Any such orders must be approved by Congress.
I need to understand this better...I thought I had a rough understanding...but my understanding of the constitution is not at the level I want it to be.