The four councils going for devolution in the East Midlands have formally voted in favour of the plans.
Nottingham City Council, Derby City Council, Derbyshire County Council, Nottinghamshire County Council have agreed to proceed with the plans which they say could bring in benefits worth more than £1.14 billion.
The councils have now agreed on a final version of the proposals – which will give them greater power over issues such as the environment, skills training, transport, housing, and the economy – which could come into force by spring of next year pending Parliamentary approval and Royal Assent.