New regulations strengthening worker protections under the Americans with Disabilities Act could be used by advocates of smoke-free workplaces to force a smoking ban in Las Vegas casinos. The new ADA protections, which legal experts say will cover millions more disabled Americans, specify that medical conditions that rarely flare up and are controlled by medication are covered if they otherwise hamper a person’s ability to breathe and move.

But Brian Pedrow, a disabilities attorney with Ballard Spahr in Philadelphia, said federal law only requires employers to make a reasonable effort to accommodate the disabled. A smoking ban would likely be considered unreasonable, although moving a worker to a non-smoking area would probably fit the “reasonable accommodation” requirement under federal law, Mr. Pedrow said.

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