In my first CPL class (many years ago) we were warned that exposure of the "concealed" gun is a violation. One example story was of a woman who opened her purse at Meijer to get her check book and was met by Sterling Heights Police outside the store because the clerk saw her gun in her purse and panicked.
I have seen many replies on this site and others and my conclusion is that 1). it is a gray area and 2). nobody has the "right" answer and 3). Whoever wrote the MI CPL law has no clue about OC or how the OC and concealed currently fail to co-exist within the definitions of our laws. Maybe one day a respected member of government or law enforcement will write an opinion that will clarify this.
As stated above, not a gray area.
CPL instructors in general are incapable of correctly understanding, much less passing along the law. LEO are generally worse.
Could the Sterling Heights event happened, sure, but highly unlikely. It was more than likely made up, or it happened to someones cousin's, brother, neighbor. Meijers makes it clear they follow state law. A clerk wouldn't call 911, especially on a customer that is paying her bill
Read the PDF posted above. Read the MOC tri-fold. Attend an OC seminar.