The doctor the gives the exemption must be licensed to practice in the state that the exemption applies. The paper from the California doctor is worthless in Michigan. I would suggest obtaining an exemption from a doc in Michigan and present that at your court hearing. We went through the exact same question on these forums about a month ago.
If you feel my answer is rude, mean, snarky or in anyway not to your liking, I did my job. You don't need to tell me.
No private messages, I do not reply to them.