Since GM crops were legalized in 2005, Monsanto has charged Brazilian farmers royalties of 2% on their sales of Roundup Ready soya beans. The company also tests Brazilian soya beans that are sold as non-GM — if they turn out to be Roundup Ready, the company charges the farmers 3%. Farmers challenged this as an an unjust tax on their business.
In April a regional court ruled against Monsanto, though that ruling has been put on hold pending an appeal. The Supreme Court, meanwhile has said that whatever the final ruling is, it will apply throughout the whole country.