Most of the regulatory authorities of the Administrator contained in this part are delegated to appropriate TTB officers. Those TTB officers are specified in TTB Order 1135.9, Delegation of the Administrator's Authorities in 27 CFR Part 9, American Viticultural Areas. You may obtain a copy of this order by accessing the TTB Web site (http://www.ttb.gov) or by mailing a request to the Alcohol and Tobacco Tax and Trade Bureau, National Revenue Center, 550 Main Street, Room 1516, Cincinnati, OH 45202.