Quote:
Originally Posted by Martinjlm
In my experience it’s only been within the past 15 years or so that automakers started developing to the most stringent regulations. For decades automakers engineered 49 State Emissions and California Emissions in parallel. More recently the cost to develop both calibrations plus the workload and scarcity of qualified calibrators has moved automakers to engineer to the most stringent (always California) regulations.
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It's interesting to me that you would need a waiver to implement more-strict regulations; usually it is the other way around. Anyway. "State's rights," I guess.