LOL! This is total complete nonsense. Writing a 'law' or an 'order' is meaningless unless there is some governing body to enforce it.
California, for example, no longer recognizes Federal Law or American Law to be binding on them. They are certainly not going to follow some executive directive coming from Trump. They do not even recognize Trump as having any authority over them in any capacity. California does not even recognize Trump as a legitimate President.
Oh well. Better to sign than not, I guess? No expectations that it will change anything in the least. The American Left does not consider themselves to be bound by American Laws in general. And with so many Police Chiefs, Mayors, Governors, and Judges who are sympathetic to their cause, so far they are absolutely right.