trade preference schems on blue

trade preference schems blue background preferential tariffs duty-free incentives agreements tariff preferences regional arrangements rules origin zones concessions non-reciprocal market access programs special certificates quota-free trading partners criteria erosion reductions treatment cumulation value conditions product-specific sectoral utilization margin graduation mechanism minimis thresholds rates duty quota remission schemes rate quotas assessment proof share developed countries negotiations evaluation monitoring suspensions harmonization scheme eligibility review compliance administration reforms