not perform as well throughout the whole denomination thanks to the dramatic differences within the large growing area". O'Keefe is in favor of putting subzones on the labels as this would greatly help consumers understand the stark differences among Brunellos from Montalcino's greatly varied territory, proposing 8 subzones: Montalcino North, Montalcino South, Castelnuovo dell'Abate, Camigliano, Tavernelle, Bosco, Torrenieri, Sant'Angelo. Winemaking and regulations Brunello di Montalcino is made 100% from Sangiovese. Traditionally, the wine goes through an extended maceration period where color and flavor are extracted from the skins. Following fermentation the wine is then aged in oak. Traditionally, the wines are aged 3 years or more "in botte"—large Slavonian oak casks that impart little oak flavor and generally produce more austere wines. Some winemakers will use small French barrique which impart a more pronounced vanilla oak flavor. There is a middle ground where the wine is aged in small barrique for a short time and then spends a longer sojourn in the traditional botte. Most producers will separate their production between a normale and riserva bottling. The normale bottles are released on the market 50 months after harvest and the riserva are released a year afterward. The current aging requirements were established in 1998 and dictate that Brunellos are to be aged in oak for 2 years and at least 4 months in a bottle before release. Winemakers who intentionally stray from these rules and regulations can possibly receive a conviction of commercial fraud accompanied by an imprisonment sentence of up to six years. Brunellopoli In 2008, reports surfaced that Italian authorities were investigating claims that several major Brunello producers were adulterating their wines by using foreign or domestic grape varieties in violation of the DOCG regulations, which stipulate that only Sangiovese may be used to make Brunello. The prosecutor handling the investigation said he would bring commercial fraud charges that could result in imprisonment for the violators. The producers in question were suspected of adding wine made from non-approved grapes in order to make it more appealing to the international market. In response the U.S. government blocked imports of Brunello that did not have proof that they were in fact 100% Sangiovese. The scandal was coined Brunellopoli by the Italian wine press. Grapes and wines The Sangiovese grape is the most widely planted grape in the Montalcino region and is the only permitted grape in the Brunello di Montalcino