OOC: The operating hours provision still violates GAR #302. I don't know how you can salvage it.
Anyway, I think neither cars nor no-smoking zones are the right comparison - in effect, you are telling smokers they aren't permitted to smoke except at night. I am not convinced that such a provision actually protects people from the evils of smoking (any more than outlawing heroin has been effective at reducing heroin use/abuse), and I am similarly unconvinced that closing casinos for two thirds of the day will actually stop more than a small fraction of the most functional gambling addicts.
Meanwhile the casinos themselves, and their workers, all earn markedly less than they hitherto have. This provision simply does not protect the consumer in any meaningful way.