Has anyone heard of what before? Not sure what you are asking. I'll try to cover what I think you are asking.

If you are planning on using 2nd hand exposure leading to a positive result save your breath. That isn't going to fly, he tested positive because he had it in his system from smoking or ingesting it. Not because you have a grower down in your basement.

Even if your hubby had a Medical MJ Card doesn't mean an employer can't say sorry, we don't want drug users working for us. It wouldn't matter if the company was in Michigan or not.

I'd ask your hubby to be honest about his smoking history because people who don't smoke pot don't test positive for it unless there was a mix up at the lab. Good luck.