Change a penalty and provide a fee for violating the open burning ban

This bill changes Nebraska's penalty for violating open burning bans and adds a fee for violators. It amends Section 81-520.02 to classify violations as a Class III misdemeanor (previously described as "Class III IV misdemeanor" in the text) and authorizes municipalities or fire districts to charge violators fees covering their costs for responding to and extinguishing fires caused by the violation. The fee must reflect the approximate cost of the fire response. The original penalty section is repealed, and the new fee mechanism applies to violations of sections 81-520.01 or 81-520.03-81-520.05.