Good catch, I didn't notice the commercial part there. I guess that makes sense for trucks flying down hills, but there's no way I'd keep my foot on the clutch for an entire hill instead of going into neutral. I think both of the sections should be for commercial vehicles.
Of course, the law was written and last revised in 1942, so it could probably use some updating anyway. Although I doubt there are any police officers who have actually written a ticket for coasting down a hill in neutral.
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