so far thats up in the air.
as the law reads, it states an Enclosed and Locked facility. it states nothing about a roof.
in Genesee county, a guy was arrested for having 6 plants in a locked and wrapped 6ft high dog kennel. FANG (Flint Area Narcotics Group i think it is) could "see the plant with binoculars from a neighbors back yard." i believe is what was quoted.
the guy had a locked and fenced yard, with the 6ft dog kennal wrapped with black plastic to not permit view into the kennel from the sides. plants i guess were maybe 5 ft tall or so, not sure of the details on this part. but anyways, the kennel was closed but not locked, though the only way to get to the kennel was to jump the fence (illegal entry) or go thru the locked gate or garage/house ect (again illegal entry unless the owner invites you). So the Genesee county judge, as he interprited "enclosed and locked facility" thought the defendant suited the standards of the law, and dismissed the case.
the Flint PA and our State AtGen Bill Shuete have made an appeal to the states supreme court on the issue. so jury is still out, but for the time being, due to the flint judges ruleing, their is a precedent set it is legal, as long as your within the terms of the law... ie. Enclose (out of view) and Locked Facility." Until the SSC makes a ruling. i have no idea when its docketed for them to view.
i guess i would contact a local laywer, and see what his advice would be.