The Ontario Power Authority (OPA) was an independent, non-profit corporation established through the Electricity Restructuring Act, 2004 (Bill 100). Licensed by the Ontario Energy Board, it reported to the Ontario legislature through the Ministry of Energy. The OPA was responsible for: In April 2012, the Energy Minister of Ontario Christopher Bentley introduced legislation in Parliament to merge the Ontario Power Authority and the Independent Electricity System Operator. Ontario Power Authority merged with IESO on January 1, 2015.