Australian Agriculture Minister Warren Truss has unveiled a new method of allocating quotas for beef exports to the US. The US is Australia's main destination for beef exports but Australia is limited to 378,214 metric tons of tariff-free beef exports to the US per year. A 26% tariff applies to anything over that amount. Last year, the tariff-free limit was breached for the first time since it was introduced back in 1994, reported Dow Jones International.