The twenty areas of responsibility devolved to the Welsh Government, known as "subjects", include agriculture, economic development, education, health, housing, local government, social services, tourism, transport and the Welsh language. On its creation in 1999, the National Assembly for Wales had no primary legislative powers. In 2007, following passage of the Government of Wales Act 2006 (GoWA 2006), the assembly developed powers to pass primary legislation known at the time as Assembly Measures on some specific matters within the areas of devolved responsibility. Further matters have been added subsequently, either directly by the UK Parliament or by the UK Parliament approving a Legislative Competence Order (LCO, a request from the assembly for additional powers). The GoWA 2006 allows for the Senedd to gain primary lawmaking powers on a more extensive range of matters within the same devolved areas if approved in a referendum. A referendum on extending the law-making powers of the then National Assembly was held on 3 March 2011 and secured a majority for extension. Consequently, the assembly became empowered to make laws, now known as Acts of Senedd Cymru, on all matters in the subject areas, without needing the UK Parliament's agreement.