Cloth may not be tacked nor folded for sale to merchants unless they are opened to the buyers for inspection, for instance for concealed inferior wool. Workers, weavers, and fullers shall put their seals to every cloth. And anyone could bring his own wools, woolfells, leather, and lead to the staple to sell without being compelled to sell them in the country. Special streets or warehouses were appointed with warehouse rent fixed by the mayor and constables with four of the principal inhabitants. Customs duties were regulated and machinery provided for their collection. No one was to forestall or regrate, that is, buy at one price and sell at a higher price in the same locale. Forestallers were those who bought raw material on its way to market. Regrators were those who tried to create a "corner" in the article in the market itself. Anyone may ship or carry grain out of the nation, except to enemies, after paying duties. But the council may restrain this passage when necessary for the good of the nation. Any merchant, privy or stranger, who was robbed of goods on the sea or lost his ship by tempest or other misfortune on the sea banks, his goods coming to shore could not be declared Wreck, but were to be delivered to the merchant after he proves ownership in court by his marks on the goods or by good and lawful merchants. All stakes and obstacles set up in rivers impeding the passage of boats shall be removed. Imported cloth shall be inspected by the King's officials for non-standard measurements or defects [despite town franchises]. No one shall leave the nation except at designated ports, on pain of one year's imprisonment. English merchants may carry their merchandise in foreign ships if there are no English ships available.