Regarding the California order, there's more to go on than the super broad federal list of critical infrastructure sectors. If you go to
https://covid19.ca.gov/stay-home-except-for-essential-needs/ there is a link to the current list of Essential Critical Infrastructure Workers (
http://covid19.ca.gov/img/EssentialCriticalInfrastructureWorkers.pdf). From that document, here are all Essential Workforce entries dealing with aviation:
• Employees who repair and maintain vehicles, aircraft, rail equipment, marine vessels, and the equipment and infrastructure that enables operations that encompass movement of cargo and passengers
• Air transportation employees, including air traffic controllers, ramp personnel, aviation security, and aviation management
• Workers who support the maintenance and operation of cargo by air transportation, including flight crews, maintenance, airport operations, and other on- and off- airport facilities workers
Also, regarding comments that this isn't really an "order" and is just a set of guidelines or recommendations, that's incorrect. Violating the order is a misdemeanor, punishable by up to a $1000 fine or 6 months in jail. Are they going to arrest people? Of course not. But it is indeed an order with the force of law behind it. The order has references to the relevant state code sections.