Ah, well now we have a source-backed, cited, and apparently definitive answer. I guess we can put this one to bed now.
Yes we can. Unless you have worked in the amusement industry and are familiar with AB850 (the California assembly bill passed that regulates the amusement industry) and the ASTM F.24 standards on ride designs...
But he ( Burkhart ) never said anything of the sort. He said it was Six Flags decision to add the OTSR to Revolution, and that the ride can no longer operate any other way, period. It has nothing to do with any law, and he never even hinted that was the case.
Actually, I believe he cited ASTM standards as the reason why they can't do anything else and said it was a company-wide policy to follow those guidelines.
Which translates to: we don't want to spend the money for train modifications, so we're just going to run with the excuse that "we can't make any changes because we have to operate the ride based on the SOP, and the SOP says OTSR's!" I certainly don't blame them (there are a lot better things that money can go to), but there really is nothing preventing them from doing so if they wanted to.