A product receiving FDA certification is not the same thing as being FDA-approved. Authorization allows a product to be marketed for sale - and the FDA has denied marketing to over one million flavored nicotine devices.
Right now, the only products authorized for sale are tobacco and menthol products from makers Logic, NJOY, and Vuse, ruling out the large majority of products sold at vape shops.
The law will be enforced by the state Alcoholic Beverage Control agency. Violations carry a $1000 fine.