Oregon has some of the most stringent legal requirements in the United States. If the label states a varietal, the bottle must contain at least 90% of that grape variety. There is an exception made, however, for Cabernet Sauvignon, which only needs to contain 75%. The bottle must also contain 95% of the stated vintage grapes, and if an AVA is listed, 100% of the grapes must be grown within that AVA. Chaptalization is also forbidden.