"open" means the firearm is transported in plain view, in a case designed for carrying firearms, which case is wholly or partially visible, in a gun rack mounted in the vehicle, in an exterior locked compartment or a trunk of a vehicle.
Since a firearm can't be in two places at once I'm thinking all of those are considered "open" and the commas should be read as "or".
Since a firearm can't be in two places at once I'm thinking all of those are considered "open" and the commas should be read as "or".