 The Commission could be ordered by the Secretary of State to undertake "structural reviews" in specified areas and recommend the creation of unitary authorities in the two-tier shire counties of England.The Commission, chaired by John Banham, conducted a review of all the non-metropolitan counties of England from 1993 to 1994, making various recommendations on their future.After much political debate and several legal challenges, the Commission's proposals resulted in the abolition of Berkshire county council and the counties of Avon, Cleveland, Hereford and Worcester and Humberside (created in 1974).