Michigan regulators say Detroit casinos must ban smoking on their gambling floors and limit capacity to 15% initially when they are allowed to open by Gov. Gretchen Whitmer. The Michigan Gaming Control Board approved minimum reopening guidelines for the commercial casinos Monday, though they remain closed under a gubernatorial order. Many tribal casinos, which aren't regulated by the state, have already reopened or will do so soon. Also Monday, a judge ruled that the governor’s coronavirus-related workplace safety orders include excessive penalties for violations. He said the penalties can't exceed a $500 fine and 90-day misdemeanor.