I see a lot more here than just the affect on "authorities" from 2 units of government. They addressed the whole "field" of pre-emption as it applies to quasi-local municipal corporations. It looks like school boards and districts may also be affected by this ruling.
To all that assisted in the defense of MOC...
BRAVO ZULU
"Occupation of the field" doctrine is more than just school districts.
It's everything under the state. That includes universities, community college districts, school districts, intermediate school districts, you name it.
I'm sure it'll take another lawsuit to prove this to, say, the University of Michigan, who still has a 60-day misdemeanor on the books for weapons/firearm possession.