‘We’re not going to ask for proof’: Michigan’s mask mandate change complicates things for businesses Updated 4:11 PM; Today 3:52 PM Tyler Rorah, 18, of Brooksville, receives a Moderna COVID 19 vaccine shot from LPN Sonie Woods, right, while receiving his CDC (issued) Covid 10 Vaccination Card during his vaccination appointment on Monday, April 5, 2021.Douglas R. Clifford/Tampa Bay Times via AP Facebook Share Vaccinated people no longer have to mask up indoors in Michigan starting this weekend – a move applauded by many state business leaders. But the move also complicates the mask mandate — which still remains in effect indoors for unvaccinated people — and brings new questions about how the rule will be enforced. With the Legislature and business leaders speaking out against the idea of vaccine passports, it leaves the new rules subject to the honor system.