Selected final bound, MFN applied and preferential tariffs for MPS commodities, 2013 (cont.) Source, WTO Tariff Download Facility, http://tariffdata.wto.org/Default.aspx. Bentzen and F. Tarp (2006), “Vietnam’s Accession to the WTO: Lessons from Past Trade Agreements”, Discussion Paper No. Org/docrep/009/ag089e/AG089E00.htm#TOC.