Is the chemical enterprise essential?

Via the governor of California, this list of essential businesses, including this section: 

The Chemical Sector—composed of a complex, global supply chain—converts various raw materials into diverse products that are essential to modern life. Based on the end product produced, the sector can be divided into five main segments, each of which has distinct characteristics, growth dynamics, markets, new developments, and issues: Basic chemicals; Specialty chemicals; Agricultural chemicals; Pharmaceuticals; Consumer products 

Essential Workforce

• Workers supporting the chemical and industrial gas supply chains, including workers at chemical manufacturing plants, workers in laboratories, workers at distribution facilities, workers who transport basic raw chemical materials to the producers of industrial and consumer goods, including hand sanitizers, food and food additives, pharmaceuticals, textiles, and paper products.
• Workers supporting the safe transportation of chemicals, including those supporting tank truckcleaning facilities and workers who manufacture packaging items
• Workers supporting the production of protective cleaning and medical solutions, personal protective equipment, and packaging that prevents the contamination of food, water, medicine, among others essential products
• Workers supporting the operation and maintenance of facilities (particularly those with high risk chemicals and/ or sites that cannot be shut down) whose work cannot be done remotely and requires the presence of highly trained personnel to ensure safe operations, including plant contract workers who provide inspections
• Workers who support the production and transportation of chlorine and alkali manufacturing,single-use plastics, and packaging that prevents the contamination or supports the continued manufacture of food, water, medicine, and other essential products, including glass container manufacturing

I imagine that companies will be more-or-less running on the honor system here, but it seems to me that if you're work at a plant in California, you're considered part of the essential workforce. Would be interesting to know if/how this will be enforced...