Tariffication is an effort to convert all existing agricultural Non-tariff barriers to trade (NTBs) into bound tariffs and to reduce these tariffs over time. A bound tariff is one which has a 'ceiling' beyond which it cannot be increased. Tariffication is an effort to convert all existing agricultural Non-tariff barriers to trade (NTBs) into bound tariffs and to reduce these tariffs over time. A bound tariff is one which has a 'ceiling' beyond which it cannot be increased.