The techniques of sparkling winemaking did not originate with the Benedictine monk Dom Pérignon, nor was the first purposely sparkling wine produced in the region of Champagne. Regardless, through centuries of refinement Champagne has become the world’s leading sparkling wine and the vinous embodiment of luxury and celebration.
"Some NM houses own a significant portion of their own vineyards;"
"Contrôle des Structures prohibits any firm from farming more than fifteen owned or rented hectares."
These two passages seem to contradict each other. Can anyone please explain?