10U.K.In relation to any function exercised on behalf of the Crown by a department or authority to which this Act applies which was previously exercisable on behalf of the Crown by a department or authority to which this Act does not apply, the reference to the department or authority to which this Act applies includes a reference to the other department or authority if the other department or authority—
(a)ceased to exercise the function before the commencement of this Act; or
(b)where it exercised the function after the commencement of this Act, only did so when it was a department or authority to which this Act applied.