What is characteristic of statutory bodies?

What is characteristic of statutory bodies?
As a statutory body has been created by statute (Act of Parliament, in the UK), it has an officially recognised status. Typically, a statutory body may be a part of national or local government, or a QUANGO. Some charities, such as the National Trust, are not statutory bodies, but they have certain powers delegated to them, so that they can make their own bye-laws.