Final answer:
Nontariff barriers are rules, regulations, inspections, and paperwork that make it more difficult to import products. They often involve government participation in trade and can involve ownership.
Step-by-step explanation:
Nontariff barriers are all the other ways that a nation can draw up rules, regulations, inspections, and paperwork to make it more costly or difficult to import products. These barriers often involve government participation in trade, especially in customs and other administrative procedures. They can also involve ownership and are sometimes referred to as virtual barriers.