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This is how I interpret the law. If someone posts a 30.06 sign at the entrance to a parking lot, it would not be binding to someone with a LTC, UNLESS that parking lot belongs to a school district, chemical plant, etc. If that big ugly sign is posted in the entrance to the School district lot, NO LTC person can have a gun in their car. What the Principal said was true since the parking lots are not posted. You on the other hand have received verbal notice and that makes it as binding as a sign. Most school districts have it in their employee handbooks that guns are not allowed on district property.

Maybe Keith or Charles will chime in.