Corpinat question

Hey all, around one year ago 9 cava producers untied togethet to form a new labelind term called Corpinat that is assuring high quallithy sparkling wine from Penedes. As far as I know, those producers do not label themself anymore as Cava DO and just writing Corpinat. As I know for now it is only a labeling term and wine is not DO. Is anyone have more info about the legal status of this term? Of course I know that even it is not a DO it is higher quality level then most Cava's