The Wales Act 1978 was an Act of the Parliament of the United Kingdom intended to introduce a limited measure of self-government in Wales through the creation of a Welsh Assembly. Complete the following sentence: The Wales Act 1978 was an Act of the Parliament of the United Kingdom intended to introduce a limited measure of self-government in Wales through the creation of a Welsh Assembly. Act never took effect as a result of the "no" vote in
1979 Welsh devolution referendum and was repealed in 1979.