If you were a police officer you would receive updates and newsletters on a daily if not weekly basis about Michigan's laws and changes to them. In addition you would sit through training regarding changes to Michigan law. If you were a cop after Governor Snyder signed into law Michigan's Motorcycle Helmet Use law in April 2012 you received a newsletter in the Michigan State Police Update, training from superiors and enough memos that would leave no doubt regarding the nuances of the new law. Makes sense, new law passes, inform cops.
Bipolar Disorder runs in my family, those of us affected refer to it as “the gene of the damned”. My father is bipolar, my mother is not. I am bipolar, my brother is not. The same is true with extended family, some are affected, some are not.