1) Based on 100 % Baga (written confirmation from producer must accompany the offer) 2) Brut, Extra Brut or Brut Nature 3) Traditional method 4) Min. 12 months bottle ageing on lees (written confirmation from producer must accompany the offer) 5) Only one offer per manufacturer. If more than one offer is submitted from the same manufacturer, the lowest priced offer will be assessed, regardless of wholesaler 6) "Guarantee of supply" must accompany the offer