NBC report on states allowing adults to carry guns onto school grounds

This list misses out on Michigan, which allows open carry by a permit holder on school property.  Ohio also has at least one school district that is allowing staff and teachers to carry concealed handguns.  Whether these restrictions are "minor" seems at least debatable.  Also note that this list is somewhat outdated.  From NBC News earlier this year:

The Gun-Free School Zones Act of 1990 prohibits anyone from having a firearm in a school zone. But that law includes the same exception recognized by the states identified in NBC News' survey: It doesn't apply if the weapons are "approved by a school in the school zone."
And in any event, Reps. Thomas Massie, R-Ky., and Steve Stockman, R-Texas, have introduced measures in the new Congress that would repeal the federal law altogether.
Here are the 18 states that allow adults to carry loaded weapons onto school grounds with few or minor conditions:


• Alabama (which bans possessing a weapon on school grounds only if the carrier has "intent to do bodily harm")

• California (with approval of the superintendent)

• Connecticut (with approval of "school officials")

• Hawaii (no specific law)

• Idaho (with school trustees' approval)

• Iowa (with "authorization")

• Kentucky (with school board approval)

• Massachusetts (with approval of the school board or principal)

• Mississippi (with school board approval)

• Montana (with school trustees' permission)

• New Hampshire (ban applies only to pupils, not adults)

• New Jersey (with approval from the school's "governing officer")

• New York (with the school's approval)

• Oregon (with school board approval)

• Rhode Island (with a state concealed weapons permit)

• Texas (with the school's permission)

• Utah (with approval of the "responsible school administrator")

• Wyoming (as long as it's not concealed)