Sigh. Why add the part about a notification requirement? That just puts a further burden on law abiding people because a criminal intent on harming the police will still not abide by that requirement.
Appeal to the purpose of the law. The purpose of the law is not to prevent self defense, or to protect Law Enforcement. The purpose of the law is to prevent hunting from a vehicle.
Since Part 1A already prevents shooting from a vehicle, the loaded gun provision in part 1B are unnecessary. Simply remove part 1B and be done with it.