Staple right
The staple right, also translated stacking right or storage right, both from the Dutch stapelrecht, was a medieval right accorded to certain ports, the staple ports. It required merchant barges or ships to unload their goods at the port and to display them for sale for a certain period, often three days. Only after that option had been given to local customers were traders allowed to reload their cargo and travel onwards with the remaining unsold freight.
Limited staple rights were sometimes given to towns along major trade-routes like Görlitz, which obtained staple rights for salt and woad, and Lviv gained them in 1444.
A related system existed in medieval and Tudor England, covering the sale and export of wool and leather and known as the Staple.