“… 1 , 2 , 3 , 4 , 5 Although labelled over the past 30 years with multiple terms, such as regionalization, compartmentalization and containment zones, trading zones essentially involve the establishment of areas within a country, which are considered of negligible risk of transmitting disease through livestock and livestock product shipments to other areas of the country or internationally. 6 Creation and recognition of livestock and livestock product trading zones have most often occurred through bilateral arrangements between exporters and their importing customers. Earlier efforts tended to document subnational areas as eligible to trade based on the absence of disease through formal agreements, such as the progression of South American exporters Argentina and Brazil through foot‐and‐mouth disease (FMD)‐free stages: first involving regions practicing vaccination and then regions without vaccination.…”