We just received a letter from the school with the dates of the new Michigan Merit Exam (MME) and the make-ups. The dates conflict with the Midwest Regional (Chicago) and the West Michigan Regional.
The main testing days are March 13-15, the 13th being for the ACT+Writing (for us, only the Juniors are going that day). The Midwest Regional is on March 15-17.
The make-up days for the MME are 2 weeks after, March 27-29. The West Michigan Regional is March 29-31.
For both of these, the Thursday of the regional is conflicting. I don’t know if you must make up certain portions on certain days (most likely yes).
In general, rules about this sort of thing tend to be pretty stringent.
Hopefully, this helps other teams in planning ahead.