Nevada passes a statute that any 18-wheel truck passing through Nevada must meet a Clean Fuel Fleet Exhaust Emission Standard of no more than 2.8 nitrous oxide (NOx). The federal statute requirement for such trucks is no more than 3.8 NOx. Carlton is driving his 18-wheeler cross-country to deliver a load and stops at a Nevada weigh station. The weigh station officer inspects Carlton’s documents, notes that Carlton’s truck has a 3.4 NOx emission level, and issues a citation. On what grounds might Carlton fight this citation?

Nevada passes a statute that any 18-wheel truck passing through Nevada must meet a Clean Fuel Fleet Exhaust Emission Standard of no more than 2.8 nitrous oxide (NOx). The federal statute requirement for such trucks is no more than 3.8 NOx. Carlton is driving his 18-wheeler cross-country to deliver a load and stops at a Nevada weigh station. The weigh station officer inspects Carlton’s documents, notes that Carlton’s truck has a 3.4 NOx emission level, and issues a citation. On what grounds might Carlton fight this citation?