[xyzzy21]

Semiconductors are not regulated except in terms of large scale externalities - e.g. water quality, air emissions, etc. Otherwise they pretty much use any methods, processes or means that they want. They do have economic incentives based on the constraints of physics - you can't boost defect densities of wafers by screaming at Mother Nature so to assure a market for your products, there are constraints on quality and process that all things equal you'd skip since they are "cost centers".