Criollo agave and the denomination?
Calle23 makes a version of their tequila based on Criollo, which is a sort of variaty of Blue Weber. I have been a bit confused as to how it has been possible to introduce this variaty without getting into conflict with the denomination? As I understand it, there are other varieties which may also be used without violating the denomination, but ARE they being used? And did the introduction of the Criollo not cause any discussions?