(Wines&Vines) - One of the consequences of having wineries in all 50 states is that there are now more regions petitioning the Alcohol and Tobacco Tax and Trade Bureau (TTB) to establish American Viticultural Areas (AVAs). Since the Loess Hills District AVA in Iowa became official in April, three additional AVAs have been established east of the Rockies, and two more have received a “notice of proposed rulemaking,” the final step before an AVA is approved.