Can anyone enlighten me about any rules governing what can be called
"blanc de noirs" Champagne (or sparkling wine)? Since all but Blanc de
Blancs contains Pinot Noir and/or Pinot Meunier, must a BdN lack any
Chardonnay? Is there an upper limit to the amount of Chardonnay that
can be in a BdN? And is there any difference in encepagement between
BdN and rosé Champagne?

Mark Lipton