The limits are 220 ppm HC and 1.2 CO content. I usually read between 25-30 ppm and right around 0 on the CO.
As for making sense, no. But since when does the government worry about common sense when passing a law? I will have more sympathy if they ever do anything about all the diesel trucks pouring that trash into the air. That's not going to happen, 'cause the industry wouldn't bow down to it like the joe civilian population does.
Like anything else the govt. does, it all boils down to how much money it will make/cost.
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