GATT Article II obligates members to impose tariff rates that are no higher than their bound rates. According to WTO, “Bound rate is the maximum rate of duty (tariff) that can be imposed by the importing country on an imported commodity. Here, each country commits itself to a ceiling on customs duties (tariff) on a certain number of products. These rates vary from country to country and commodity to commodity. But no country can raise duties above the bound rate it has committed, and the rate of customs duty actually applied may be lower than the bound rate.