Wine classified with the Chianti Classico 'Black Rooster' must adhere to strict government regulations, including:

Minimum 80% Sangiovese (20% other varieties).
Blending can no longer include white grapes (yes, you read that right ‘no longer’; white in red was once a thing; same story in the Roero region of Piedmont).
Minimum 12% alcohol.
Chianti Classico Riserva must be aged 24 months before released to market.