Were the companies required to provide parts for decades by regulation? And the regulation had been there when they were selling the first prototypes?

When the earliest cars/PCs were pushed to the market, did the government tell the manufacturers that they have to provide parts for decades, otherwise they'll be punished in this or that way?

Not a rhetorical questions. I genuinely don't know the answer. But adminttedly I'd be quite surprise if the answer is yes.