Those sherry companies which appear in the Ageing Bodega Register - collectively known as "almacenistas" (wholesalers) - must also be located within the Ageing and Maturing Zone, that is to say within the municipal boundaries of Jerez de la Frontera, El Puerto de Santa María or Sanlucar de Barrameda and must comply with the requirements established in the Regulations of the Denomination of Origin governing the ageing of sherry wine. The wines from these bodegas are always sold on to shipping bodegas which incorporate them into their own ageing systems or use them in the final blending of their commercial brands.