The National Assembly for Wales was created by the Government of Wales Act 1998 - and its powers extended by the Government of Wales Act 2006. It has 60 members who serve a 4 year term - 40 are elected for individual constituencies and the remainder from 5 geographical areas. These representatives are known as AMs (Assembly Members).
The website of the Assembly can be found at http://www.assemblywales.org/index.htm