First of all, a State legislator in CA has proposed that CA not import electricity from other States or Mexico, where it is produced not in compliance with CA CO2 laws. This is about 20% of their electricity.
It is mostly directed at the coal fired Navajo Generating Station, because the left bitterly hates coal and wants to outlaw its use altogether.
Second, AZ currently keeps tens of thousands of CA prisoners in private prisons. So if the boycott is legitimate, they should be sent home to CAs already overcrowded prisons, or released in CA.
There are only three major crossings on the border between AZ and CA. They have fruit inspection stations on them, that could easily be turned into citizenship inspection stations. If you’re not a legal citizen, turn your vehicle around, Californian.
They are unofficially used for that. The Interstate 10 crossing usually has at least one Border Patrol vehicle there. In April we crossed they had a big presence there. Several vehicles including a bus.