From Distillers Wiki
Like most French wines, Calvados is governed by the Appellation d'Origine ContrÃ´lÃ©e appellation contrÃ´lÃ©e regulations.
The Appellation Calvados contrÃ´lée area includes all of the Calvados, Manche, and Orne départements, plus parts of Eure, Mayenne, Sarthe, and Eure-et-Loir.
The more restrictive Appellation Calvados Pays d'Auge contrÃ´lée area is limited to the east end of Calvados département, plus a few adjoining districts.
Calvados should be aged in oak for several years before bottling - look for the phrases "vieilli en chêne" and "vieilli en fÃ»ts de chêne".