vahuvein, mida valmistatakse väljaspool Champagne’i piirkonda traditsioonilisel meetodil ja valmistamise protsessi reguleerivad AOC määrused, a high-quality French or Luxembourgish sparkling wine made outside the Champagne region using the traditional method, governed by AOC regulations that require minimum aging on lees, specific permitted grape varieties, and controlled production standards to ensure complexity and finesse
