Over the past few years the World Trade Organization (WTO) has been called upon to investigate cases of domestic content rules (DCR, also known as local content rules or LCR) in renewable energy policy. In a more recent case, Ontario was accused of violating trade law by requiring renewable energy developers to purchase a designated amount of locally sourced materials for projects as part of its feed-in tariff (FIT) program. In December 2012, the WTO found these practices to be illegal and upheld its ruling in May after an appeal was issued. Meanwhile, many countries still incorporate similar rules in their incentive programs.